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AP® Physics 1 & 2

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Difficult

Multiple Angular Momenta

APPH12-YNBEFG

A wheel ($r=0.35\text{ m}$; $m=4\text{ kg}$) is currently rotating at a constant angular velocity of $+4\text{ rad/s}$ as shown in the image. The forces shown are applied for $3.5\text{ s}$.

What is the final angular velocity after the time has elapsed?

A

$+6\text{ rad/s}$

B

$-6\text{ rad/s}$

C

$+24\text{ rad/s}$

D

$-24\text{ rad/s}$