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WorksheetsAP Physics Uniform Circular Motion
Total questions: 25
Worksheet time: 17mins
Which of the following ranks the tensions in the strings from highest to lowest?
A>C>D>B
B>D>C>A
B>C>A>D
D>A>C>B
How does the speed in Case A compare to the speed in Case B?
twice as large
one fourth as large
four times as large
one half times as large
The time taken for one complete cycle is called the...
Period
Frequency
Angular velocity
What happens to an object's speed as the radius is cut in half?
It is halved
It doubles
It remains unchanged.
A curved groove is place on the top of a level table as shown in the diagram. A ball is pushed in the groove at P so that it leaves at Q. Which picture shows how the ball will move when it leaves the groove at Q?
What is the range of the speed of a rider so that he is able to complete the loop in a Ferris Wheelof radius r ?
less than √rg
less than or equal to √rg
more than √rg
more than or equal to √rg
Why does an object experiencing uniform circular motion have an acceleration?
because it ir changing speed
because it is changing direction
because it is moving n a straight line
because it has mass
What is the force that causes centripetal acceleration when a car goes around the curve?
normal force
centrifugal force
frictional force
weight
In this diagram, what do the red arrows represent?
the acceleration vector
the velocity vector
the centripetal force vector
the force of gravity
At point P, he car hits an area of ice and loses all frictional force on it tires. Which path does the car follow on the ice?
A
B
C
D
A centripetal force F is applied to an object moving at a constant speed v in a horizontal circle of radius r. If the radius is quadrupled and the speed is doubled, what happens to the centripetal force?
Increased by a factor of 2
decreased by a factor of 2
doesn’t change
increased by a factor of √2
A roller coaster car is on a track that forms a circular loop of radius R in the vertical plane. If the car is to just maintain contact with track at the top of the loop, what is the minimum value for its velocity at this point?
gR
0.5gR
2gR
(gR)1/2
A coin rests on a turntable a distance r from the axis of rotation. The turntable rotates with a constant speed of v. What is the minimum coefficient of static friction between the turntable and the coin?
v2rg
v2/rg
rg/v2
v2/r
An object m is tied to one end of a string, moves in a circle with a constant speed v on a horizontal frictionless table. The second end of the string is connected to a big mass M and goes through a small hole in the table. What is the value of M if it stays in equilibrium?
mv2/rg
v2/rmg
rg/mv2
mv2r/g
A rock attached to a string swings in a vertical circle, as shown, with negligible air resistance. Which of the following diagrams could correctly show all the forces on the rock at the position shown?
A ball of mass m is attached to a vertical rod by two massless strings. The rod is rotated about its axis so that both strings are taut, with tensions T1 and T2, respectively. The ball rotates in a horizontal circle of radius r with speed v as shown.
What is the magnitude of the net force on the ball?
mv2/ r
mg
T2
T2 + mv2r
T1 + mg
