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AP® Physics C: Mechanics

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Moderate

Torque and Angular Momentum

APPHMC-VXVX13

A $5$ $Nm$ torque acts on a thin hoop with a mass of $500$ $g$ and a radius of $15$ $cm$ for $10$ $s$.

If the hoop starts from rest, what is the new angular velocity of the disc?

A

$ 666 \cfrac{rad}{s}$

B

$ 1,300 \cfrac{rad}{s}$

C

$ 2,000 \cfrac{rad}{s}$

D

$ 4,444 \cfrac{rad}{s}$

E

$ 8,888 \cfrac{rad}{s}$