AP® Physics 1 & 2

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Moderate

New Angular Velocity

APPH12-TZ7YBZ

A flat disk is rotating about an axis of rotation perpendicular to the disk and through the center of mass. The dimensions and angular velocity are shown in the image on the left below.

Suddenly the radius shrinks to what is in the right image with no change in mass and no net torque provided.

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

Which value is the best approximation of the new angular velocity based on the information given?

A

$8.3\text{ rad/s}$

B

$1.8\text{ rad/s}$

C

$0.625\text{ rad/s}$

D

$14\text{ rad/s}$