A wheel has a constant angular acceleration of \( 3.0 \mathrm{rad} / \mathrm{s}^{2} \), During a...

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A wheel has a constant angular acceleration of \( 3.0 \mathrm{rad} / \mathrm{s}^{2} \), During a certain \( 4.0 \mathrm{~s} \) interval, it turns through an angle of \( 120 \mathrm{rad} \). Assuming that at \( \mathrm{t}=0 \), angular speed \( \omega_{0}=3 \mathrm{rad} / \mathrm{s} \) how long, is motion at the start of this \( 4.0 \) second interval ?
- (1) \( 7 \mathrm{sec} \).
(2) 9 sec.
(3) 4 sec.
(4) \( 10 \mathrm{sec} \).
\( \mathrm{P} \)
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