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JEE PHYSICS MCQ: SYSTEM OF PARTICLES

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A wheel is rotating at 900rpm900 \mathrm{rpm} about its axis. When power is cut-off, it comes to rest in 1 min1 \mathrm{~min}. The angular retardation (in rads−2\mathrm{rad} \mathrm{s}^{-2} ) is
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Correct option: A
π2\frac{\pi}{2}
Option A (π2\frac{\pi}{2}) is correct because the angular retardation is calculated by dividing the initial angular velocity by the time taken to come to rest.

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