szymanski physics ch 6
Terms in this set (96)
An object traveling in circular path is constantly changing...
toward the center of the curve
A car travels in a circle with constant speed. The net force on the car is directed...
center seeking force
centripetal force is also known as a....
Which has greater linear speed, a horse near the outside a merry-go-around or a horse near the inside rail?
Neither - they both have the same angular speed
Which has greater angular speed, a horse near the outside rail of a merry-go-around or a horse near the inside rail?
If you are driving, and round a sharp curve to the left at constant speed, your body leans...
Motion of an object turning around an axis outside the object is called a...
The spinning motion that takes place when an object turns around an axis located within the object is called a
The number of rotations or revolutions per unit of time is its
true or false: A straight line about which rotation takes place is called an axis.
true or false: Any force that causes on object to move in a circular path is called a centripetal force.
true or false: The rotational speed of a wheel is defined as the number of rotations it makes in a unit of time.
true or false: If Earth were its present size but twice as massive, we would weigh less.
true or false: The force of attraction between two masses depends inversely on the square of the distance between the masses. Any law that has this kind of dependence on distance is called an inverse square law.
true or false: Gravity is the weakest universal force, but it is the most effective force over long distances.
true or false: The farther apart two objects are, the stronger the gravitational force.
true or false: The greater the mass of an object, the stronger its gravitational force.
true or false: Earth's gravitational force is stronger than the gravitational force of the sun.
true or false: A center-directed centripetal force continuously changes the direction of an object to make it move in a circle.
true or false: The word centripetal means "toward the outside".
true or false: Acceleration toward the center of a curved or circular path is called gravitational acceleration.
true or false: A change in the speed or direction of an object is called inertia.
true or false: Centrifugal force does not exist.
the product of two masses
According to Newton's law of universal gravitation, the force of attraction between two masses is directly proportional to
As the distance between two objects increases, the force of attraction between them
The force of gravity increases with...
force of gravity on an object
Weight is a measure of the
Weight can be measured in
the pull of gravity
the weight of an object varies with...
amount of matter in the object
mass varies with the
The attractive force between all objects in the universe is called
An object transported from the surface of Earth to the surface of the moon has its weight
If the radius of Earth decreased, with no change in mass, your weight would
If the mass of Earth increased, with no change in radius, your weight would
Two objects move toward each other because of gravitational pull. As the objects get closer and closer, the force between them
The orbital speed for a satellite orbiting very close to Earth's surface is
The speed of a satellite in a circular orbit is
A circle is a special case of
its total energy
What remains constant for satellite in an elliptical orbit?
Motion of an object turning around an axis outside the object.
Spinning motion that takes place when an object rotates about an axis located within the object.
Force of attraction between any two masses.
Number of rotations or revolutions per unit of time.
A center directed force that causes an object to move in a curved path.
true or false: The oval shape of orbits followed by most satellites is called a circle
true or false: As comets approach the sun in their orbits, their speed increases.
true or false: An object that orbits another is considered a satellite.
true or false: The force that exists between you and Earth is correctly called as your mass.
true or false: An object that moves around an external axis is said to be rotating.
Once you release the ball either directly downward or horizontally, the only force acting on it is gravity. When any object is thrown in the air, it becomes
A projectile moves forward due to its
a project accelerates downward due to
Gravity pulls the projectile downward as it moves forward. The combination of the two motions is a __________ path.
Motion parallel to Earth's surface is ________motion.
Motion perpendicular to Earth's surface is __________ motion.
The horizontal component of a projectile's velocity remains
The vertical component of projectile's velocity ___________ with time.
Each component is _____________of the other but their combined effects produce the variety of curved paths that projectiles follow.
The horizontal distance traveled by a projectile is called the ________.
The maximum height is the height of a projectile when its vertical component of velocity is
When the effect of air resistance is significant, the range of a projectile gets
If air resistance is__________, a projectile will rise to its maximum height in the same time it takes to fall from that height to ground.
An Earth's satellite is a projectile traveling _______enough to fall around Earth rather than into it.
The path followed by a projectile is called
The curved path a projectile follows is called ___________.
The length of a vector represents its
displacement, velocity, acceleration, momentum, force, and weight
what are the vector quantities?
length, volume, speed, mass, density, pressure, temperature, energy, work, and power
what are the scalar quantities?
does not change
For a projectile the horizontal velocity
At what angle does a projectile fly the farthest?
At which angle does a projectile fly the highest?
magnitude and direction
A vector is a quantity that has
The vector that is sum of two or more vectors is called a
A ball is thrown into the air at some angle between 10 degrees and 90 degrees. At the very top of the ball's path, its velocity is
all of the above
When velocity is represented as a vector
a. the length of the arrow represents the speed
b. the length of the arrow is drawn to a suitable scale
c. the direction of the arrow shows the direction of motion
d. all of the above
What is the minimum resultant possible when adding a 3-unit vector to an 9-unit vector?
What is the maximum resultant possible when adding a 3-unit vector to an 9-unit vector?
As an object falls freely in a vacuum, its velocity
In the absence of air resistance, objects fall at constant
true or false: The vector sum is called resultant.
true or false: The orientation of a vector shows its direction.
true or false: When adding two vectors at right angles, the resultant of the vectors is the algebraic sum of the two vectors.
true or false: Any vector can be represented by two other vectors that are at right angles to each other.
true or false: Mass is a vector quantity.
true or false: The length of a vector represents its magnitude.
true or false: The acceleration due to gravity at the surface of the Earth is 1m/s/s.
The _________________velocity of a projectile is considered to be constant.
An object that falls around Earth is called a ___________.
The process of resolving a vector into components is called ________________.
An object that is thrown through the air.
Total distance divided by time.
Motion parallel to Earth's surface.
Motion perpendicular to Earth's surface
The horizontal distance traveled by a projectile.
Speed in a given direction.
In the absence of air resistance, at what other angle will a thrown ball go to the same horizontal distance as one thrown at an angle of 75 degrees?
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