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# Angular Speed Given Constant Angular Acceleration

APPHMC-OT0RNX

A circular disk of radius $R$, initially at rest, starts spinning with a constant angular acceleration of $\alpha$.

The angular speed of the disk after it completes $1$ revolution is

A

$\sqrt {2 \alpha}$

B

$\sqrt {2\pi \alpha}$

C

$2\sqrt {\pi \alpha}$

D

$4\sqrt {\pi \alpha}$

E

$\sqrt {\pi \alpha}$