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MHT CET202611 April 2026Morning ShiftPhysicsRotational MotionActual

A wheel is rotating at 600 rpm about its axis of rotation. When the power is cut off, it comes to rest in half a minute. Its angular retardation expressed in rad / s ^2 is (retardation is uniform)

Options

  1. A2 3
  2. B4
  3. C6

Correct answer

A. 2 3

Step-by-step solution

Initial angular velocity, ₀ = 600 rpm = 600 2 60 rad/s = 20 rad/s Final angular velocity, = 0 Time taken to come to rest, t = 30 s Using the equation of kinematics for rotational motion, = ₀ + t 0 = 20 + (30) = - 2 3 rad/s ^2 The angular retardation is 2 3 rad/s ^2 . Answer: 2 3

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