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MHT CET2019Morning ShiftPhysicsRotational MotionActual

A body of mass m is performing a UCM in a circle of a radius r with speed v. The work done by the centripetal force in moving it through 2 3 rd of the circular path is

Options

  1. AZero
  2. Bm v 2 π r
  3. C2 π m v 2 r 3
  4. D2 m v 2 π 3

Correct answer

A. Zero

Step-by-step solution

When a body perform uniform circular motion, then centripetal force acts always in perpendicular, direction to its velocity, hence work done by centripetal force is always zero. Hence, work done by centripetal force is zero, when it through 2 3 rd of the circular path.

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