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AP® Physics 1 & 2

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Data Needed to Find Angular Momentum

APPH12-EMOFD3

Consider a wheel at rest with a mass hanging tangent to the wheel's edge as shown.

Created for Albert.io. Copyright 2016. All rights reserved.

When the mass is released it falls under the influence of gravity only (no upward force from the rope), causing the wheel to rotate.

Which of the following provides a correct procedure for finding the final angular momentum of the wheel?

A

Measure the radius of the wheel, the distance from the hanging mass to the floor, and the mass of the hanging object. These three measurements can be combined to find the final angular momentum.

B

Measure the mass of the hanging object and the time it takes the mass to reach the floor once released. These two measurements can be combined to find the final angular momentum.

C

Measure the radius of the wheel, the distance from the hanging mass to the floor, and the mass of the wheel. These three measurements can be combined to find the final angular momentum.

D

Measure the distance to the floor and the time it takes the hanging mass to reach the floor. These two measurements can be combined to find the final angular momentum.