Angular Momentum

Practice Questions

AP Physics 1 › Angular Momentum

Page 1 of 2
10 of 16
1

A satellite is rotating once per minute. It has an moment of inertia of . Erin, an astronaut, extends the satellite's solar panels, increasing its moment of inertia to . How quickly is the satellite now rotating?

2

I start pushing a merry-go-round with a torque of 10 Newton-meters. It has a moment of inertia of . What is its rotational speed after 3 seconds assuming it starts at rest?

3

A blob of clay of mass is dropped on top of a rotating disk's edge of mass spinning at a speed of . What will the resulting rotational speed be?

4

A comet is orbiting a star in a far distant galaxy wth only gravity acting upon it. After a period of time, the sun's radiation partially melts the comet, decreasing the mass to a fourth of what it was. Simultaneously, because of an irregular orbit, its distance to the star doubles. What expression best describes the comet's angular velocity, , compared to its original conditions (before the melting/distance change)?

5

A bowling ball of mass and radius is traveling down a slope with a vertical height change of . If the ball starts from rest, what is the final linear velocity of the ball as it reaches the bottom of the slope? Neglect air resistance.

6

Two identical cars are racing side by side on a circular race track. Which has the greater angular momentum?

7

A weight on a rope is swung around at until it comes into contact with a resting brick on flat ground. The brick travels . What is the coefficient of kinetic friction between the the brick and ground?

8

Pinball paddle problem

A rectangular rod on a horizontal table top is shown in the left side of the diagram. The rod is hinged at one end, as shown. It rotates in such a way that it hits a stationary ball as shown in the diagram's right side. The rod rotates without friction at a rate of until it contacts the ball. As a result of the collision, the rod comes to rest and the ball moves to the right. The mass of the rod is 0.2kg. The mass of the ball is 0.067kg. The length of the rod is 0.15m. The moment of inertia of a rod rotated about the end is: . What is the ball's speed as a result of the collision?

9

Two cars are racing side by side on a perfectly circular race track. The inner car is from the center of the track. The outer car is from center of the track.

If the outer car is moving at , determine it's angular momentum.

10

In an isolated system, the moment of inertia of a rotating object is halved. What happens to the angular velocity of the object?

Page 1 of 2
Return to subject