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Final
Terms in this set (235)
The column of Trajan, erected in Rome in 106-113 A.D., is 125 feet tall. What is its height in centimeters?
3810
Leonardo da Vinci's "Mona Lisa" is 21 inches wide and 30.25 inches tall. What is the area of the painting in square centimeters?
4098
A drinking glass has a diameter of 2.5 inches and is 5.5 inches tall. What is the volume of the drinking glass in cubic centimeters?
440
Tutankhamen's gold coffin weighs 250 pounds. What is the mass of the coffin in kilograms?
111
How long does it take for a train traveling 60.4 miles per hour to travel 81 miles?
1.3
How many significant figures are in 10,002?
5
How many significant figures are in 120.07?
5
The Gateway Arch in St. Louis is approximately 193 meters tall. What is its height in feet?
633
Mrs. Jones went on a diet and lost 15 kilograms. How many pounds did she lose?
33
The Hoover Dam is 726 feet high. What is its height in kilometers?
0.221
How many significant figures are in 0.067?
2
How many significant figures are in 0.0689?
3
The peak of Mt. Everest, at 10,900 meters, is the highest point above sea level in the world. What is its elevation in miles?
6.77
The length of the Appalachian Trail is 2,015 miles. How long is it in kilometers?
3245
The king's chamber of the great pyramid is 10.43 meters long, 5.21 meters wide, and 5.82 meters high. What is the volume of the chamber in cubic feet?
11160
A stone is thrown with an initial velocity of +7.0 m/s. The acceleration of the stone is constant and has the value of -9.8 m/s2. What is the velocity of the stone after 0.50 s?
2.1
A car is moving with a constant acceleration. At t = 5.0 s its velocity is 8.0 m/s and at t = 8.0 s its velocity is 12.0 m/s. What is the distance traveled in that interval of time?
30
A car starts from rest and accelerates at 6.00 m/. How far does it travel in 3.00 s?
27
An airplane starts from rest and accelerates at 10.8 m/s2. What is its speed at the end of a 400 m-long runway?
93.0
A car is moving with a speed of 32.0 m/s. The driver sees an accident ahead and slams on the brakes, giving the car a deceleration of 3.50 m/s2. How far does the car travel after the driver put on the brakes before it comes to a stop?
146
Refer to Figure 2-1. If you start from the Bakery, travel to the Cafe, and then to the Art Gallery, what is the magnitude of your displacement?
2.5
If you start from the Bakery, travel to the Art Gallery, and then to the Cafe, in 1.0 hour, what is your average speed?
9.0
A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m. He completes one lap in 2.0 minutes. What is his average speed?
4.2
. A car is making a 12-mile trip. It travels the first 6.0 miles at 30 miles per hour and the last 6.0 miles at 60 miles per hour. What is the car's average speed for the entire trip?
40
A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m. She completes one lap in 100 seconds. What is her average velocity?
0
1. A stone is thrown straight up. When it reaches its highest point,
its velocity is zero m/s.
its acceleration is zero m/s.
both its velocity and acceleration are zero m/s.
neither is zero m/s.
It velocity is zero
Two athletes jump straight up. John has twice the initial speed of Harry. Compared to Harry, John stays in the air
twice as long
An object is thrown upwards with a speed of 14 m/s. How high above the projection point does it reach?
10
An object is thrown upwards with a speed of 14 .0 m/s. How long does it take it to reach its maximum height?
1.43
An object is thrown upwards with a speed of 15 m/s. How long does it take it to reach a height of 6.0 m on the way up?
0.47
The gravitational force that the Sun exerts on Earth is much larger than the gravitational force that Earth exerts on the Sun.
false
What would be the weight of a 59.1-kg astronaut on a planet twice as massive as Earth and having twice Earth's radius?
290
What would be the weight of a 59.1-kg astronaut on a planet with the same density as Earth and having twice Earth's radius?
1160
At their closest approach, Venus and Earth are 4.20 x 1010 m apart. The mass of Venus is 4.87 x 1024 kg, the mass of Earth is 5.97 x 1024 kg, and G = 6.67 x 10 11 Nm2/kg2 What is the force exerted by Venus on Earth at that point?
1.10 x 10^18
The mass of Pluto is 1.25 x 1022 kg and its radius is 1.14 x 106 m. What is the value of g at the surface of Pluto? G = 6.67 x 10-11 Nm2/kg2.
0.642
You are on an airplane traveling with a constant velocity at an altitude of 20,000 m. What is the acceleration of gravity at that altitude? The radius of Earth is 6.37 x 106 m.
9.75
The acceleration due to gravity on the surface of Earth is g. Calling R the radius of Earth, at what distance from Earth's center would the acceleration due to gravity drop to g/16?
4r
Planet Z-34 has a mass equal to one-third that of Earth and a radius equal to one-third that of Earth. With g representing, as usual, the acceleration due to gravity on the surface of Earth, the acceleration due to gravity on the surface of Z-34 is
3
The moons of Mars, Phobos (Fear) and Deimos (Terror), are very close to the planet compared to Earth's Moon. Their orbital radii are 9,378 km and 23,459 km respectively. What is the ratio of the period of revolution of Phobos to that of Deimos?
0.2528
Asteroid Ida was photographed by the Galileo spacecraft in 1993, and the photograph revealed that the asteroid has a moon, which has been named Dactyl. From the dimensions of Ida and its general features, one can estimate the mass of Ida to be 4.5 x 1016 kg, and the distance between Dactyl and Ida is approximately 90 km. Assuming a circular orbit, what would be the orbital speed of Dactyl?
5.8
Uranus completes one revolution about its own axis every 17.24 hours. What is the radius of the orbit required for a satellite to revolve about Uranus with the same period? Uranus has a mass of 8.69 x 1025 kg and G = 6.67 X 10-11 Nm2/Kg2
8.27 x 107
A space vehicle is orbiting Earth in a circular orbit with a radius of 10,300,000 m. What is the minimum increase in speed that is needed for the vehicle to escape Earth's gravitational field? The mass of Earth is 5.97 x 1024 kg and G = 6.67 X 10-11 Nm2/kg2
2580
Neptune has a radius of 2.48 x 107 m and an escape velocity of 23,300 m/s. What is the mass of Neptune? G = 6.67 X 10-11 Nm2/kg2
1.01 X 1026
Planet Z-34 has a mass equal to one-third that of Earth and a radius equal to one-third that of Earth. If Ve is the escape velocity for Earth, the escape velocity for Z-34 is
Ve
The highest tides occur when
a) the Sun and the Moon are on the same side of Earth.
b) the Sun and the Moon are on opposite sides of Earth.
c) the Sun, Moon, and Earth form a right-angled triangle with Earth at the 90o vertex.
d) the Sun, Moon, and Earth form a right-angled triangle with the Moon at the 90o vertex.
the Sun and the Moon are on the same side of Earth.
A man is holding an 8.00-kg vacuum cleaner at arm's length, a distance of 0.550 m from his shoulder. What is the torque on the shoulder joint if the arm is horizontal?
43.12
A man is holding an 8.00-kg vacuum cleaner at arm's length, a distance of 0.550 m from his shoulder. What is the torque on the shoulder joint if the arm is held at 30.0° below the horizontal?
37.4
A 15.0-kg child is sitting on a playground teeter-totter, 1.50 m from the pivot. What force, applied 0.300 m on the other side of the pivot, is needed to make the child lift off the ground?
736
A 15.0-kg child is sitting on a playground teeter-totter, 1.50 m from the pivot. What is the minimum distance, on the other side of the pivot, such that a 220-N force will make the child lift off the ground?
1.00
The drive chain in a bicycle is applying a torque of 0.850 Nm to the wheel of the bicycle. Treat the wheel as a hoop with a mass of 0.750 kg and a radius of 33.0 cm. What is the angular acceleration of the wheel?
10.4
A vector A has components Ax=12m and A7=5m. What is the magnitude of the vector
13
A vector A has components Ax=12.0m and Ay= 5.00m. What is the angle that vector A makes with the x-axis?
22.6
A displacement vector is 34.0 m in length and is directed 60.0 east of north. What are the components of this vector?
north 17 and south 29.4
A soccer player carries the ball for a distance of 40.0m in the direction 42.0 west of south. Find the westward compoonent of the balls
26.76
A vector is located in the x-y plane. The x and y componets of this vector are 4m and 3m, respectively. FInd the angle that this vector makes witht he positive y-axis
53.13
Vector A=6.0m and points 30 north of east. Vector B= 4m and points 30 east of north. The resulant vector A+B is given by
9.7m at an angle 42 north of east
A student adds two perpendicular displacement vectors of magnitude 12.0 cm and 8.0cm. Which of the following is the only choice for the magnitude of the resulant displacement of these two vectors
14.42
A boy jumps at a speed of 20.0m/s at an angle of 25 degrees above the horizontal. What is the horizontal component of the boy's velocity
18.1
Vector M= 4.00m points eastward and vector N= 3.00m points northward. The resultant vector M+N is given by
5m at an angle 36.9
Vector A= 6 and 30 south of east. VectorB= 4.0m and points 30 east of south. The resultant vector A+B is given by
9.7m at an angle 42 south of east
A vector A = 6.0m and points 30 south of east. Vector B= 4.0m and points 30 west of south. The resulant vector A+B is given by
7.2 at an angle of 64 south of east
A vector A = 6.0m and points 30 south of east. Vector B= 4.0m and points 30 west of south. The resulant vector A+B is given by
7.2 at an angle of 64 south of east
The magnitudes of the vectors A= 7.0cm B= 6.0cm, and C= 4.0cm. The components of the resultant vector are given by?
x = -11.25 y =-4.5
The magnitudes of the vectors A= 7.0cm B= 6.0cm, and C= 4.0cm. The components of the resultant vector are given by?
x = -11.25 y =-4.5
A car goes 8km north, 2km west and 1 km south. How much has the car been displaced north and east?
7 north and -2 east
A car goes 8km north, 2km west and 1 km south. How much has the car been displaced north and east?
7 north and -2 east
What is the angle between the vectors A and -A when these vectors are drawn from a common orgin?
180
What is the angle between the vectors A and -A when these vectors are drawn from a common orgin?
180
A car travels along east with a constant velocity. The magnitude of the accleration of the car is
Decreasing
increasing
zero
0
A car travels along east with a constant velocity. The magnitude of the accleration of the car is
Decreasing
increasing
zero
0
A boy throws a ball at an initial velocity of 26 m/s at an angle of 20o above the horizontal. How high above the projection point is the ball after 1.4 s?
2.8
A boy throws a ball at an initial velocity of 26 m/s at an angle of 20o above the horizontal. How high above the projection point is the ball after 1.4 s?
2.8
A boy kicks a football with an initial velocity of 20 m/s at an angle of 25o above the horizontal. The acceleration of the ball while it is in flight is
- 9.8
A boy kicks a football with an initial velocity of 20 m/s at an angle of 25o above the horizontal. The acceleration of the ball while it is in flight is
- 9.8
A projectile is launched with an initial velocity of 80 m/s at an angle of 30o above the horizontal. Neglecting air resistance, what is horizontal component of the projectile's acceleration?
0
A projectile is launched with an initial velocity of 80 m/s at an angle of 30o above the horizontal. Neglecting air resistance, what is horizontal component of the projectile's acceleration?
0
A boy kicks a football with a certain initial velocity at an angle 20o above the horizontal. In 2.0 seconds, the ball reaches at its highest point in its trajectory. What is the initial velocity of the ball?
57
A boy kicks a football with a certain initial velocity at an angle 20o above the horizontal. In 2.0 seconds, the ball reaches at its highest point in its trajectory. What is the initial velocity of the ball?
57
The horizontal and vertical components of the initial velocity of a football are 24 m/s and 7 m/s respectively. What is the initial velocity of the football?
25
The horizontal and vertical components of the initial velocity of a football are 24 m/s and 7 m/s respectively. What is the initial velocity of the football?
25
A bullet is fired from ground level with a speed of 150 m/s at an angle 30.0o above the horizontal at a location where g = 10.0 m/s2. What is the horizontal component of its velocity when it is at the highest point of its trajectory?
130
A bullet is fired from ground level with a speed of 150 m/s at an angle 30.0o above the horizontal at a location where g = 10.0 m/s2. What is the horizontal component of its velocity when it is at the highest point of its trajectory?
130
A bullet is fired from ground level with a speed of 150 m/s at an angle 30.0o above the horizontal at a location where g = 10.0 m/s2. What is the vertical component of its velocity when it is at the highest point of its trajectory?
0
A bullet is fired from ground level with a speed of 150 m/s at an angle 30.0o above the horizontal at a location where g = 10.0 m/s2. What is the vertical component of its velocity when it is at the highest point of its trajectory?
0
A bullet is fired from ground level with a speed of 150 m/s at an angle 30.0o above the horizontal at a location where g = 10.0 m/s2. What is the vertical component of its velocity after 4 seconds?
35
A bullet is fired from ground level with a speed of 150 m/s at an angle 30.0o above the horizontal at a location where g = 10.0 m/s2. What is the vertical component of its velocity after 4 seconds?
35
A bullet is fired from ground level with a speed of 150 m/s at an angle 30.0o above the horizontal at a location where g = 10.0 m/s2. What is the vertical component of its velocity after 4 seconds?
5
A bullet is fired from ground level with a speed of 150 m/s at an angle 30.0o above the horizontal at a location where g = 10.0 m/s2. What is the vertical component of its velocity after 4 seconds?
5
A hockey puck slides off the edge of a table with an initial velocity of 20 m/s. The height of the table above the ground is 2.0 m. What is the magnitude of the velocity of the puck just before it touches the ground?
20.95
A hockey puck slides off the edge of a table with an initial velocity of 20 m/s. The height of the table above the ground is 2.0 m. What is the magnitude of the velocity of the puck just before it touches the ground?
20.95
A person throws a ball horizontally from the top of a building that is 22.0 m above the ground level. The ball lands 100 m down range from the base of the building. What was the initial velocity of the ball?
47.2
A person throws a ball horizontally from the top of a building that is 22.0 m above the ground level. The ball lands 100 m down range from the base of the building. What was the initial velocity of the ball?
47.2
A ball is thrown horizontally with an initial velocity of 40 m/s from a height of 10 m. How long will it take for the ball to touch the ground? Use g = 10 m/s2.
1.4
A ball is thrown horizontally with an initial velocity of 40 m/s from a height of 10 m. How long will it take for the ball to touch the ground? Use g = 10 m/s2.
1.4
A ball is thrown horizontally with an initial velocity of 20.0 m/s from the edge of a building of a certain height. The ball lands at a horizontal distance of 82.0 m from the base of the building. What is the height of the building?
82.3
A ball is thrown horizontally with an initial velocity of 20.0 m/s from the edge of a building of a certain height. The ball lands at a horizontal distance of 82.0 m from the base of the building. What is the height of the building?
82.3
A boy kicks a football from ground level with an initial velocity of 20 m/s at an angle of 30o above the horizontal. What is the horizontal component of its velocity just before it hits the ground?
17
A boy kicks a football from ground level with an initial velocity of 20 m/s at an angle of 30o above the horizontal. What is the horizontal component of its velocity just before it hits the ground?
17
A boy kicks a football with an initial velocity of 20 m/s at an angle of 30o above the horizontal. What is the vertical component of its velocity at the highest point of its trajectory?
0
A boy kicks a football with an initial velocity of 20 m/s at an angle of 30o above the horizontal. What is the vertical component of its velocity at the highest point of its trajectory?
0
for which value is the range a projectile fired from ground level maximum
45
A ball is thrown at an angle 45o above the horizontal with an initial velocity of 20 m/s. What is the total time of flight of the ball before it hits the ground?
2.9
A ball is thrown at an angle 40.0o above the horizontal with an initial velocity of 22.0 m/s. What is the range of the ball?
48.6
A bullet is fired from ground level with a speed of 150 m/s at an angle 30.0o above the horizontal at a location where g = 10.0 m/s2. What is the range of the bullet (horizontal distance from the starting point to the point where it lands on the ground)?
1950
A projectile is shot from the edge of a vertical cliff 60.0 m above the ocean. It has a speed of 100 m/s and is fired at an angle of 35.00 above the horizontal. How far from the foot of the vertical cliff does the projectile hit the water?
1080
An object is moving with constant velocity. Which of the following statements is true?
A) A constant force is being applied in the direction of motion.
B) There are no forces acting on the object.
C) The net force on the object is zero N.
D) There is no frictional force acting on the object.
The net force on the object is zero N.
An object is moving with constant velocity. Which of the following statements is true?
A) A constant force is being applied in the direction of motion.
B) There are no forces acting on the object.
C) The net force on the object is zero N.
D) There is no frictional force acting on the object.
The net force on the object is zero N.
A force of 120 N is applied to an object whose mass is 30 kg. The object's acceleration is
4
A force of 120 N is applied to an object whose mass is 30 kg. The object's acceleration is
4
A net force of 120 N is applied to a certain object. As a result, the object accelerates with an acceleration of 24.0 m/s2. The mass of the object is
5
A net force of 120 N is applied to a certain object. As a result, the object accelerates with an acceleration of 24.0 m/s2. The mass of the object is
5
A 777 aircraft has a mass of 300,000 kg. At a certain instant during its landing, its speed is 27.0 m/s. If the braking force is 430,000 N, what is the speed of the airplane 10.0 s later?
12.7
A 777 aircraft has a mass of 300,000 kg. At a certain instant during its landing, its speed is 27.0 m/s. If the braking force is 430,000 N, what is the speed of the airplane 10.0 s later?
12.7
What average net force is required to accelerate a car with a mass of 1200 kg from 0 to 27.0 m/s in 10.0 s?
3240
What average net force is required to accelerate a car with a mass of 1200 kg from 0 to 27.0 m/s in 10.0 s?
3240
A 50.0-kg crate is being pulled along a horizontal, smooth surface. The pulling force is 10.0 N and is directed 20.0° above the horizontal. What is the acceleration of the crate?
0.188
A 50.0-kg crate is being pulled along a horizontal, smooth surface. The pulling force is 10.0 N and is directed 20.0° above the horizontal. What is the acceleration of the crate?
0.188
A 40.0-kg box is being pushed along a horizontal, smooth surface. The pushing force is 15.0 N directed at an angle of 15.0° below the horizontal. What is the acceleration of the crate?
0.362
A 40.0-kg box is being pushed along a horizontal, smooth surface. The pushing force is 15.0 N directed at an angle of 15.0° below the horizontal. What is the acceleration of the crate?
0.362
A person has a mass of 45 kg. How much does she weigh on the Moon, where g = 1.62 m/s2?
72.9
A person has a mass of 45 kg. How much does she weigh on the Moon, where g = 1.62 m/s2?
72.9
An astronaut weighs 99.0 N on the Moon, where the acceleration of gravity is 1.62 m/s2. How much does she weigh on Earth?
600
An astronaut weighs 99.0 N on the Moon, where the acceleration of gravity is 1.62 m/s2. How much does she weigh on Earth?
600
A 40.0-kg crate is being lowered by means of a rope. Its downward acceleration is 2.00 m/s2. What is the force exerted by the rope on the crate?
312
A 40.0-kg crate is being lowered by means of a rope. Its downward acceleration is 2.00 m/s2. What is the force exerted by the rope on the crate?
312
A truck is towing a car whose mass is one quarter that of the truck. The force exerted by the truck on the car is 6000 N. The force exerted by the car on the truck is
6000
A truck is towing a car whose mass is one quarter that of the truck. The force exerted by the truck on the car is 6000 N. The force exerted by the car on the truck is
6000
Two boxes, one more massive than the other, rest in contact with one another on a smooth, level floor. A horizontal force F pushes on one or the other of the boxes. The contact force between the boxes
is larger when F is applied to the less massive box.
Two boxes, one more massive than the other, rest in contact with one another on a smooth, level floor. A horizontal force F pushes on one or the other of the boxes. The contact force between the boxes
is larger when F is applied to the less massive box.
A 3.0-kg and a 5.0-kg box rest side-by-side on a smooth, level floor. A horizontal force of 32 N is applied to the 3.0-kg box pushing it against the 5.0-kg box, and, as a result, both boxes slide along the floor. How large is the contact force between the two boxes?
20
A 3.0-kg and a 5.0-kg box rest side-by-side on a smooth, level floor. A horizontal force of 32 N is applied to the 3.0-kg box pushing it against the 5.0-kg box, and, as a result, both boxes slide along the floor. How large is the contact force between the two boxes?
20
A 3.0-kg and a 5.0-kg box rest side-by-side on a smooth, level floor. A horizontal force of 32 N is applied to the 5.0-kg box pushing it against the 3.0-kg box, and, as a result, both boxes slide along the floor. How large is the contact force between the two boxes?
12
A 3.0-kg and a 5.0-kg box rest side-by-side on a smooth, level floor. A horizontal force of 32 N is applied to the 5.0-kg box pushing it against the 3.0-kg box, and, as a result, both boxes slide along the floor. How large is the contact force between the two boxes?
12
A 1200-kg car is pulling a 500-kg trailer along level ground. Friction is negligible. The car accelerates with an acceleration of 1.3 m/s2. What is the force exerted by the car on the trailer?
650
A 1200-kg car is pulling a 500-kg trailer along level ground. Friction is negligible. The car accelerates with an acceleration of 1.3 m/s2. What is the force exerted by the car on the trailer?
650
A flatbed truck is carrying a 20.0-kg crate along a level road. The coefficient of static friction between the crate and the bed is 0.400. What is the maximum acceleration that the truck can have if the crate is to stay in place?
3.92
A flatbed truck is carrying a 20.0-kg crate along a level road. The coefficient of static friction between the crate and the bed is 0.400. What is the maximum acceleration that the truck can have if the crate is to stay in place?
3.92
A flatbed truck is carrying a 20.0-kg crate up a sloping road inclined 15.0° above the horizontal. The coefficient of static friction between the crate and the bed is 0.400. What is the maximum acceleration that the truck can have if the crate is to stay in place?
1.25
A flatbed truck is carrying a 20.0-kg crate up a sloping road inclined 15.0° above the horizontal. The coefficient of static friction between the crate and the bed is 0.400. What is the maximum acceleration that the truck can have if the crate is to stay in place?
1.25
A policeman investigating an accident measures the skid marks left by a car. He determines that the distance between the point that the driver slammed on the brakes and the point where the car came to a stop was 34.0 m. From a reference manual he determines that the coefficient of kinetic friction between the tires and the road under the prevailing conditions was 0.300. How fast was the car going when the driver applied the brakes? (This car was not equipped with anti-lock brakes.)
14.1
A policeman investigating an accident measures the skid marks left by a car. He determines that the distance between the point that the driver slammed on the brakes and the point where the car came to a stop was 34.0 m. From a reference manual he determines that the coefficient of kinetic friction between the tires and the road under the prevailing conditions was 0.300. How fast was the car going when the driver applied the brakes? (This car was not equipped with anti-lock brakes.)
14.1
A 50.0-kg box is being pushed along a horizontal surface. The coefficient of kinetic friction between the box and the ground is 0.350. What horizontal force must be exerted on the box for it to accelerate at 1.20 m/s2?
232
A 50.0-kg box is being pushed along a horizontal surface. The coefficient of kinetic friction between the box and the ground is 0.350. What horizontal force must be exerted on the box for it to accelerate at 1.20 m/s2?
232
A 50.0-kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 30.0° below the horizontal is applied to the box. The coefficient of static friction between the box and the surface is 0.400. What is the force of friction on the box?
217
A 50.0-kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 30.0° below the horizontal is applied to the box. The coefficient of static friction between the box and the surface is 0.400. What is the force of friction on the box?
217
A 50.0-kg block is being pulled up a 15.0° slope by a force of 250 N which is parallel to the slope, but the block does not slide up the slope. What is the minimum value of the coefficient of static friction required for this to happen?
0.260
A 50.0-kg block is being pulled up a 15.0° slope by a force of 250 N which is parallel to the slope, but the block does not slide up the slope. What is the minimum value of the coefficient of static friction required for this to happen?
0.260
) A box slides down a 27.0° slope under its own weight. The coefficient of kinetic friction between the box and the slope is 0.350. What is the acceleration of the box?
1.39
) A box slides down a 27.0° slope under its own weight. The coefficient of kinetic friction between the box and the slope is 0.350. What is the acceleration of the box?
1.39
As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is
static friction
As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is
static friction
The force of static friction f must be such that
The force of static friction f must be such that
The force of static friction f must be such that
The force of static friction f must be such that
The normal force F acting on the block must be such that
The normal force F acting on the block must be such that
The normal force F acting on the block must be such that
The normal force F acting on the block must be such that
A 30.0-kg crate is pulled along a horizontal floor by the ideal arrangement shown in Figure 6-2. The force F is 300 N. The coefficient of friction between the crate and the floor is 0.350. What is the acceleration of the crate?
1.57
A 30.0-kg crate is pulled along a horizontal floor by the ideal arrangement shown in Figure 6-2. The force F is 300 N. The coefficient of friction between the crate and the floor is 0.350. What is the acceleration of the crate?
1.57
When a mass of 25.0 grams is suspended from a certain spring and lowered slowly until the spring stops stretching, the spring stretches 2.00 cm. What is the spring constant of the spring?
12.3
When a mass of 25.0 grams is suspended from a certain spring and lowered slowly until the spring stops stretching, the spring stretches 2.00 cm. What is the spring constant of the spring?
12.3
A mass of 40.0 grams is attached to a vertical spring with a spring constant k = 20.0 N/m and lowered slowly until the spring stops stretching. How much does the spring stretch?
0.0196
A mass of 40.0 grams is attached to a vertical spring with a spring constant k = 20.0 N/m and lowered slowly until the spring stops stretching. How much does the spring stretch?
0.0196
A mass of 3.0 kg rests on a smooth surface inclined 28° above the horizontal. It is kept from sliding down the plane by a spring attached to a wall. The spring is aligned with the plane and has a spring constant of 120 N/m. How much does the spring stretch?
12
A mass of 3.0 kg rests on a smooth surface inclined 28° above the horizontal. It is kept from sliding down the plane by a spring attached to a wall. The spring is aligned with the plane and has a spring constant of 120 N/m. How much does the spring stretch?
12
A 10-kg sign is held by two ropes as shown in Figure 6-3. What is the tension on rope A?
88
A 10-kg sign is held by two ropes as shown in Figure 6-3. What is the tension on rope A?
88
A 2 kg ball is moving with a constant speed of 5 m/s in a horizontal circle whose radius is 50 cm. What is the magnitude of the net force on the ball?
100
A 2 kg ball is moving with a constant speed of 5 m/s in a horizontal circle whose radius is 50 cm. What is the magnitude of the net force on the ball?
100
A 1000-kg car is moving at 30.0 m/s around a horizontal curve whose radius is 100 m. What is the magnitude of the frictional force required to keep the car from sliding?
9000
A 1000-kg car is moving at 30.0 m/s around a horizontal curve whose radius is 100 m. What is the magnitude of the frictional force required to keep the car from sliding?
9000
A 2-kg ball is moving with a constant speed of 5 m/s in a horizontal circle whose radius is 50 cm. What is the magnitude of the net force on the ball?
100
A 2-kg ball is moving with a constant speed of 5 m/s in a horizontal circle whose radius is 50 cm. What is the magnitude of the net force on the ball?
100
A mass of 40.0 g is attached to a vertical spring with spring constant k = 20 N/m and lowered slowly until the spring sops stretching. How much does the spring stretch?
0.0196
A mass of 40.0 g is attached to a vertical spring with spring constant k = 20 N/m and lowered slowly until the spring sops stretching. How much does the spring stretch?
0.0196
When a mass of 25 g is suspended from a spring and lowered slowly until the spring stretches 2.00 cm. What is the spring constant of the spring?
12.3
When a mass of 25 g is suspended from a spring and lowered slowly until the spring stretches 2.00 cm. What is the spring constant of the spring?
12.3
A baseball player is running to second base at 5.63 m/s. When he is 5.20 m from the plate he goes into a slide. The coefficient of kinetic friction between the player and the ground is 0.220. What is his speed when he reaches the plate?
3.04
A baseball player is running to second base at 5.63 m/s. When he is 5.20 m from the plate he goes into a slide. The coefficient of kinetic friction between the player and the ground is 0.220. What is his speed when he reaches the plate?
3.04
An object of mass = 2 kg is pulled by a constant force F = 4 N for a horizontal distance of 2 m. (Refer to Figure below) What is the work done along the +x-axis? Neglect friction.
7 kg m2/s2
An object of mass = 2 kg is pulled by a constant force F = 4 N for a horizontal distance of 2 m. (Refer to Figure below) What is the work done along the +x-axis? Neglect friction.
7 kg m2/s2
A constant force of 100 N is applied to a mass of 40.0 kg as shown in figure below The force causes a displacement of 20.0 m to this mass along the +x-axis. Neglect friction.
1530 Nm
A constant force of 100 N is applied to a mass of 40.0 kg as shown in figure below The force causes a displacement of 20.0 m to this mass along the +x-axis. Neglect friction.
1530 Nm
A constant force of 100 N is applied to a mass of 40.0 kg as shown in figure below force causes a displacement of 20.0 m to this mass along the +x-axis. Neglect friction.
0
A constant force of 100 N is applied to a mass of 40.0 kg as shown in figure below force causes a displacement of 20.0 m to this mass along the +x-axis. Neglect friction.
0
A 100 kg object is pulled vertically upwards by a constant force of 4000 N for a distance of 20.0 m. What is the work done by the net force on the object?
60,400 kg m2/s2
A 100 kg object is pulled vertically upwards by a constant force of 4000 N for a distance of 20.0 m. What is the work done by the net force on the object?
60,400 kg m2/s2
A 100 kg object is pulled vertically upwards by a constant force of 4000 N for a distance of 20.0 m. What is the work done by the applied force on the object?
80,000 Kg m2/s2
A 100 kg object is pulled vertically upwards by a constant force of 4000 N for a distance of 20.0 m. What is the work done by the applied force on the object?
80,000 Kg m2/s2
The ratio of the final kinetic energy to the initial kinetic energy of an object is one half. If the initial velocity of the object is 10 m/s, what is the final velocity?
7.1
The ratio of the final kinetic energy to the initial kinetic energy of an object is one half. If the initial velocity of the object is 10 m/s, what is the final velocity?
7.1
How much work is done in lifting a 20 kg object through a distance of 0.40 m? Use g = 10 m/s2.
80 kg m2/s2
How much work is done in lifting a 20 kg object through a distance of 0.40 m? Use g = 10 m/s2.
80 kg m2/s2
How much energy is needed to change the speed of a 1600 kg sport utility vehicle from 15.0 m/s to 40.0 m/s?
1.10 MJ
How much energy is needed to change the speed of a 1600 kg sport utility vehicle from 15.0 m/s to 40.0 m/s?
1.10 MJ
An object of mass 10.0 kg is initially at rest. A 100 N force causes it to move horizontally through a distance of 6.00 m. What is the change in the kinetic energy of this object?
600 J
An object of mass 10.0 kg is initially at rest. A 100 N force causes it to move horizontally through a distance of 6.00 m. What is the change in the kinetic energy of this object?
600 J
An object of mass 4 kg is thrown vertically upwards from ground level with an initial speed of 20 m/s. Ignore friction and use g = 10 m/s2. What is the kinetic energy of the object as it reaches its maximum height?
0
An object of mass 4 kg is thrown vertically upwards from ground level with an initial speed of 20 m/s. Ignore friction and use g = 10 m/s2. What is the kinetic energy of the object as it reaches its maximum height?
0
The ratio of kinetic energy of object A to the kinetic energy of object B is 2:1. Object A is moving with a speed of 6.0 m/s and object B is moving with a speed of 2.0 m/s. If the mass of object A is 4.0 kg then what is the mass of object B?
18 kg
The ratio of kinetic energy of object A to the kinetic energy of object B is 2:1. Object A is moving with a speed of 6.0 m/s and object B is moving with a speed of 2.0 m/s. If the mass of object A is 4.0 kg then what is the mass of object B?
18 kg
The ratio of the mass of object A to the mass of object B is 2:1 and the ratio of their speeds is 1:2 in the same order. What is the ratio of their kinetic energies?
1:2
The ratio of the mass of object A to the mass of object B is 2:1 and the ratio of their speeds is 1:2 in the same order. What is the ratio of their kinetic energies?
1:2
How large a force is required to accelerate a 1600 kg car from rest to a speed of 25 m/s in a distance of 200 m?
2500 N
How large a force is required to accelerate a 1600 kg car from rest to a speed of 25 m/s in a distance of 200 m?
2500 N
A spring with a spring constant of 2500 N/m. is stretched 4.00 cm. What is the work required to stretch the spring?
2.00 J
A spring with a spring constant of 2500 N/m. is stretched 4.00 cm. What is the work required to stretch the spring?
2.00 J
An object of mass 4.0 kg is moved from a point A to a point C as follows: 0.80 m vertically from A to B, and then 0.60 m horizontally from B to C. What is the amount of work done as the object is moved from point A to C? Use g = 10 m/s2.
32 J from A to B and 0 J from B to C
An object of mass 4.0 kg is moved from a point A to a point C as follows: 0.80 m vertically from A to B, and then 0.60 m horizontally from B to C. What is the amount of work done as the object is moved from point A to C? Use g = 10 m/s2.
32 J from A to B and 0 J from B to C
If work is done on a system by non-conservative forces, the total mechanical energy of a system stays constant
False
If work is done on a system by non-conservative forces, the total mechanical energy of a system stays constant
False
An object of mass 2 kg is held at the top of a triangular wedge as shown in above figure, and then released. The reference level for potential energy is at the base of the triangle. Neglect friction and use g = 10 m/s2.
Refer to above figure. What is the gravitational potential energy of the object at the top of the wedge?
60
An object of mass 2 kg is held at the top of a triangular wedge as shown in above figure, and then released. The reference level for potential energy is at the base of the triangle. Neglect friction and use g = 10 m/s2.
Refer to above figure. What is the gravitational potential energy of the object at the top of the wedge?
60
An object of mass 2 kg is held at the top of a triangular wedge as shown in above figure, and then released. The reference level for potential energy is at the base of the triangle. Neglect friction and use g = 10 m/s2.
Refer to above figure. What is the kinetic energy of the object at the top of the wedge?
0
An object of mass 2 kg is held at the top of a triangular wedge as shown in above figure, and then released. The reference level for potential energy is at the base of the triangle. Neglect friction and use g = 10 m/s2.
Refer to above figure. What is the kinetic energy of the object at the top of the wedge?
0
An object of mass 2 kg is held at the top of a triangular wedge as shown in above figure, and then released. The reference level for potential energy is at the base of the triangle. Neglect friction and use g = 10 m/s2.
Refer to above figure. What is the speed of the object just before it reaches the bottom of the wedge?
8
An object of mass 2 kg is held at the top of a triangular wedge as shown in above figure, and then released. The reference level for potential energy is at the base of the triangle. Neglect friction and use g = 10 m/s2.
Refer to above figure. What is the speed of the object just before it reaches the bottom of the wedge?
8
Potential energy represented by the equation PE = mgh is a vector quantity.
A) True B) False
false
Potential energy represented by the equation PE = mgh is a vector quantity.
A) True B) False
false
A mass of 1.0 kg is pushed against a spring with a spring constant of 25 N/m. As a result, the spring is compressed by 20 cm. The mass is then released.
What is the amount of work required to compress the spring?
0.50
A mass of 1.0 kg is pushed against a spring with a spring constant of 25 N/m. As a result, the spring is compressed by 20 cm. The mass is then released.
What is the amount of work required to compress the spring?
0.50
A force of 15 N applied to a spring compresses it by 4 cm. What is the potential energy of the spring in the compressed position?
0.3 Nm
A force of 15 N applied to a spring compresses it by 4 cm. What is the potential energy of the spring in the compressed position?
0.3 Nm
A 20-kg object is resting at the top of a table 1.6 m above ground level. The object is then picked up and moved to a height of 8.7 m above ground level. What is the change in the gravitational potential energy of this object? Use g = 10 m/s2.
1420
A 20-kg object is resting at the top of a table 1.6 m above ground level. The object is then picked up and moved to a height of 8.7 m above ground level. What is the change in the gravitational potential energy of this object? Use g = 10 m/s2.
1420
Potential energy may be positive or negative.
A) True B) False
true
Potential energy may be positive or negative.
A) True B) False
true
The ratio of the kinetic energy to the potential energy of a certain object of mass m at a height of 40 m above ground level is 2:1. What is the speed of the object at the point? Use g = 10 m/s2.
40
The ratio of the kinetic energy to the potential energy of a certain object of mass m at a height of 40 m above ground level is 2:1. What is the speed of the object at the point? Use g = 10 m/s2.
40
A 2.0-g bead slides along a wire, as shown in the above figure. At point A, the bead is at rest. Neglect friction and use g = 10 m/s2.
What is the kinetic energy of the bead at point A?
0
A 2.0-g bead slides along a wire, as shown in the above figure. At point A, the bead is at rest. Neglect friction and use g = 10 m/s2.
What is the kinetic energy of the bead at point A?
0
A 2.0-g bead slides along a wire, as shown in the above figure. At point A, the bead is at rest. Neglect friction and use g = 10 m/s2.
What is the potential energy of the bead at point A?
2 X 10-2 J
A 2.0-g bead slides along a wire, as shown in the above figure. At point A, the bead is at rest. Neglect friction and use g = 10 m/s2.
What is the potential energy of the bead at point A?
2 X 10-2 J
A 2.0-g bead slides along a wire, as shown in the above figure. At point A, the bead is at rest. Neglect friction and use g = 10 m/s2.
What is the kinetic energy of the bead at point B?
2 X 10-2 J = KE
A 2.0-g bead slides along a wire, as shown in the above figure. At point A, the bead is at rest. Neglect friction and use g = 10 m/s2.
What is the kinetic energy of the bead at point B?
2 X 10-2 J = KE
A 2.0-g bead slides along a wire, as shown in the above figure. At point A, the bead is at rest. Neglect friction and use g = 10 m/s2.
What is the speed of the bead at point B?
4.5
A 2.0-g bead slides along a wire, as shown in the above figure. At point A, the bead is at rest. Neglect friction and use g = 10 m/s2.
What is the speed of the bead at point B?
4.5
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