Scheduled maintenance: Thursday, December 8 from 5PM to 6PM PST
hello quizlet
Home
Subjects
Expert solutions
Create
Study sets, textbooks, questions
Log in
Sign up
Upgrade to remove ads
Only $35.99/year
physics midterm
Flashcards
Learn
Test
Match
Flashcards
Learn
Test
Match
Terms in this set (60)
Objects that are falling toward Earth in free fall move
faster and faster
Which of the following is the equation for average velocity?
V avg= delta x/ delta t
Which of the following line segments on a velocity versus time graph is physically impossible?
vertical line
Which would fall with greater acceleration in a vacuum—a leaf or a stone?
They would accelerate at the same rate
For the winter, a duck flies 10.0 m/s due south against a gust of wind with a speed of 2.5 m/s. What is the resultant velocity of the duck?
7.5 m/s south
Which of the following is an example of a vector quantity?
velocity
Which of the following does not exhibit parabolic motion?
a flat piece of paper released from a window
Which of the following is a physical quantity that has both magnitude and direction?
vector
A late traveler rushes to catch a plane, pulling a suitcase with a force directed 30.0° above the horizontal. If the horizontal component of the force on the suitcase is 60.6 N, what is the force exerted on the handle?
70.0 N
If a nonzero net force is acting on an object, then the object is definitely
being accelerated
A hockey stick hits a puck on the ice. Identify an action-reaction pair in this situation.
The stick exerts a force on the puck; the puck exerts a force on the stick.
As an object falls toward Earth,
the upward acceleration of Earth is negligible because of its large mass.
A free-body diagram represents all of the following except
forces exerted by the object
Which form of energy is involved in weighing fruit on a spring scale?
elastic potential energy
What is the kinetic energy of a 0.135 kg baseball thrown at 40.0 m/s?
108 J
The main difference between kinetic energy and potential energy is that
kinetic energy involves motion, and potential energy involves position
Which of the following energy forms is not involved in hitting a tennis ball?
chemical potential energy
A force does work on an object if a component of the force
is parallel to the displacement of the object
Which of the following can be a centripetal force?
all of the above
Tides are caused by
differences in the gravitational force of the moon at different points on Earth.
If you lift an apple from the ground to some point above the ground, the gravitational potential energy in the system increases. This potential energy is stored in
the gravitational field between Earth and the apple.
When an object is moving with uniform circular motion, the centripetal acceleration of the object
is directed toward the center of motion
A child rides a bicycle in a circular path with a radius of 2.0 m. The tangential speed of the bicycle is 2.0 m/s. The combined mass of the bicycle and the child is 43 kg.
What kind of force provides the centripetal force on the bicycle?
friction
What is the SI unit of acceleration?
m/s^2
Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward along a y-axis.)
A cat jumps from a tree limb to the ground
Acceleration is defined as
rate of change of velocity
Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, wind velocity.
scalar, scalar, vector
A track star in the long jump goes into the jump at 12 m/s and launches herself at 20.0° above the horizontal. What is the magnitude of her horizontal displacement? (Assume no air resistance and that amc034-1.jpg = -g = -9.81 m/smc034-2.jpg.)
9.2 m
Which of the following is an example of projectile motion?
a thrown baseball
Which of the following is the best coordinate system to analyze a painter climbing a ladder at an angle of 60° to the ground?
x-axis: horizontal along the ground; y-axis: up and down
Which of the following is the tendency of an object to maintain its state of motion?
inertia
According to Newton's second law, when the same force is applied to two objects of different masses,
the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration.
The free-body diagram shown above represents a car being pulled by a towing cable. In the diagram, which of the following is the gravitational force acting on the car?
14,700
What are the units of the coefficient of friction?
The coefficient of friction has no units
A sculpture is suspended in equilibrium by two cables, one from a wall and the other from the ceiling of a museum gallery. Cable 1 applies a horizontal force to the right of the sculpture and has a tension, FT2. Cable 2 applies a force upward and to the left at an angle of 37.0° to the negative x-axis and has a tension, FT2. The gravitational force on the sculpture is 5.00 x 10mc019-3.jpgN. What is FT2?
8310 N
What is the potential energy of a 1.0 kg mass 1.0 m above the ground?
9.8 J
Which of the following formulas would be used to directly calculate the kinetic energy of an object with mass m bouncing up and down on a spring with spring constant k?
KE=1/2mv^2
A 3.00 kg toy falls from a height of 1.00 m. What will the kinetic energy of the toy be just before the toy hits the ground? (Assume no air resistance and that g = 9.81 m/smc040-1.jpg.)
29.4 J
Which of the following is a true statement about the conservation of energy?
total energy is always conserved
When a car makes a sharp left turn, what causes the passengers to move toward the right side of the car?
inertia
A child rides a bicycle in a circular path with a radius of 2.0 m. The tangential speed of the bicycle is 2.0 m/s. The combined mass of the bicycle and the child is 43 kg.
What is the magnitude of the bicycle's centripetal acceleration?
2.0 m/s2
Suppose you are given a position versus time graph. The slope of a line drawn tangent to a point on the curve of this graph describes what quantity?
instantaneous velocity
A jet moving at 500.0 km/h due east is in a region where the wind is moving at 120.0 km/h in a direction 30.00° north of east. What is the speed of the aircraft relative to the ground?
606.9 km/h
A passenger on a bus moving east sees a man standing on a curb. From the passenger's perspective, the man appears to
move west at a speed that is equal to the bus's speed
In a coordinate system, a vector is oriented at angle q with respect to the x-axis. The y component of the vector equals the vector's magnitude multiplied by which trigonometric function?
sin q
There are six books in a stack, and each book weighs 5 N. The coefficient of static friction between the books is 0.2. With what horizontal force must one push to start sliding the top five books off the bottom one?
5N
A book with a mass of 2.0 kg is held in equilibrium on a board with a slope of 60.0° by a horizontal force. What is the normal force exerted on the book?
39
In general, Fnet equals
ΣF
How much elastic potential energy is stored in a bungee cord with a spring constant of 10.0 N/m when the cord is stretched 2.00 m?
20.0 J
If friction is the only force acting on an object during a given physical process, which of the following assumptions can be made in regard to the object's kinetic energy?
kinetic energy decreases
An object's tendency to resist acceleration is measured by the object's
inertial mass
Why does an astronaut weigh less on the moon than on Earth?
The gravitational field strength is less on the moon's surface than on Earth's surface.
In the graph above, how does the acceleration at A compare with the acceleration at B?
The acceleration at B is positive and less than the acceleration at A.
Acceleration due to gravity is also called
free-fall acceleration
A football player runs in one direction to catch a pass, then turns and runs twice as fast in the opposite direction toward the goal line. Which of the following is a correct expression for the original velocity and the resulting velocity?
Vplayer, -2Vplayer
In a coordinate system, the magnitude of the x component of a vector and q, the angle between the vector and x-axis, are known. The magnitude of the vector equals the x component
divided by the cosine of q
A newton is equivalent to which of the following quantities?
kg m/s^2
A waitperson carrying a tray with a platter on it tips the tray at an angle of 12° below the horizontal. If the gravitational force on the platter is 5.0 N, what is the magnitude of the force parallel to the tray that tends to cause the platter to slide down the tray? (Disregard friction.)
1.0 N
In which of the following sentences is work used in the everyday sense of the word?
Sam and Rachel worked hard pushing the car
In the presence of frictional force,
nonmechanical energy is no longer negligible and mechanical energy is no longer conserved
Students also viewed
Pathology Chapter 6 Urinary System
57 terms
Medical Terminology exam 2
89 terms
Small parts- neonatal brain images (part…
202 terms
Physics Final
200 terms
Other sets by this creator
bio unit 3 test
38 terms
med term final
50 terms
med term midterm
87 terms
asi se dice chapter 2 vocab 1
60 terms
Verified questions
anatomy
When the eye focuses for far vision, a. the lens is at its thinnest. b. the ciliary muscles contract. c. the light rays are nearly parallel. d. suspensory fibers of the ciliary zonule are slack.
physics
A jet pilot takes his aircraft in a vertical loop (Fig. 5-46). If the jet is moving at a speed of $1200 \mathrm{~km} / \mathrm{h}$ at the lowest point of the loop, estimate the $78\,\text{kg}$ pilot's effective weight (the force with which the seat pushes up on him) at the bottom of the circle.
physics
Draw some electric field lines and a few equipotential surfaces outside a positively charged conducting cylinder. What shape are the equipotential surfaces?
physics
Find the disk of convergence for each of the following complex power series. $\sum_{n=0}^{\infty} \frac{(n !)^{2} z^{n}}{(2 n) !}$
Recommended textbook solutions
Mathematical Methods in the Physical Sciences
3rd Edition
Mary L. Boas
3,355 solutions
Sears and Zemansky's University Physics
14th Edition
Hugh D. Young, Roger A. Freedman
8,362 solutions
Fundamentals of Physics
10th Edition
David Halliday, Jearl Walker, Robert Resnick
8,943 solutions
Atkins Physical Chemistry
10th Edition
Julio de Paula, Peter Atkins
1,315 solutions
Other Quizlet sets
Diarrea aguda
57 terms
HA FINAL
62 terms
ITES Exam 3
26 terms
PSC Final
300 terms