Circular and Rotational Motion

Practice Questions

AP Physics 1 › Circular and Rotational Motion

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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

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?

3

A child is swinging a toy rocket around their head with a rope. If they double the frequency of "orbits", how will the tension in the rope change?

4

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?

5

A object moves in a circular motion with a diameter of . What is the magnitude of this object's velocity?

6

Terry is pushing a vertical lever that is attached to the floor, and he pushes above the point of rotation. If he pushes with a force of at an angle of from the ground, what is the magnitude of torque that he is applying to the lever's hinge?

7

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?

8

A child is swinging a toy rocket around their head with a rope. If they double the frequency of "orbits", how will the tension in the rope change?

9

Pluto distance to sun:

Determine the centripetal acceleration of Pluto with respect to the Sun.

10

Consider the following system:

Spinning rod with masses at end

Two spherical masses, A and B, are attached to the end of a rigid rod with length l. The rod is attached to a fixed point, p, which is at a height, h, above the ground. The rod spins around the fixed point in a vertical circle that is traced in grey. is the angle at which the rod makes with the horizontal at any given time ( in the figure).

If the maximum centripetal force felt by mass A is , what is the minimum centripetal force it feels? Neglect air resistance and internal friction.

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