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MHT CET 2020 (16 Oct, Shift 1) · Angular Variables

Angular Variables question from MHT CET 2020 (16 Oct, Shift 1)

Q33MHT CET 2020 · 16 OCT · SHIFT 1Medium

Angular Variables

A particle is moving in a radius $R$ with constant speed $v$ . The magnitude of average acceleration after half revolution is

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Answer: (c)

After half a revolution the velocity reverses: $|\Delta \vec v| = 2v$ .
Time taken $t = \frac{\pi R}{v}$ .
$a_{avg} = \frac{2v}{\pi R / v} = \frac{2v^2}{\pi R}$ .
So the answer is (c) $\frac{2v^2}{\pi R}$ .

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