A flywheel rotates with a uniform angular acceleration. Its angular velocity increases from \( 2...

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A flywheel rotates with a uniform angular acceleration. Its angular velocity increases from \( 20 \pi \)
\( \mathrm{P} \)
\( \mathrm{rad} / \mathrm{s} \) to \( 40 \pi \mathrm{rad} / \mathrm{s} \) in 10 seconds. How many
W
rotations did it make in this period?
(1) 80
(2) 100
(3) 120
(4) 150
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