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BITSAT2020PhysicsMotion in Two DimensionsActual

A wheel is rotating at 900 r .p.m. about its axis. When power is cut offit comes to rest in 1 minute. The angular retardation in rad / s ² is

Options

  1. A/ 2
  2. B/ 4
  3. C/ 6
  4. D/ 8

Correct answer

A. / 2

Step-by-step solution

Angular retardation, aligned &= ₂- ₁ t = 2 ( n ₂- n ₁ ) t &= 2 (0-900 / 60) 60 = 2 rad / s ² aligned

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