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The speed of a particle traveling in a circle of radius \( 20 \mathrm{~cm} \) increases uniformly from \( 6.0 \mathrm{~m} / \mathrm{s} \) to \( 8.0 \mathrm{~m} / \mathrm{s} \)
\( \mathrm{P} \) in \( 4.0 \mathrm{~s} \). Find the angular acceleration.
\( \mathrm{W} \)
(1) \( 2.5 \mathrm{rad} / \mathrm{s}^{2} \)
(2) \( 2.0 \mathrm{rad} / \mathrm{s}^{2} \)
(3) \( 1.5 \mathrm{rad} / \mathrm{s}^{2} \)
(4) None of these
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