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AIIMS2017PhysicsRotational Motion

Assertion : A solid sphere is rolling on a rough horizontal surface. Acceleration of contact point is zero. Reason : A solid sphere can roll on the smooth surface.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false.

Step-by-step solution

During rolling motion, there is radial acceleration towards the centre. Hence, the contact point moves vertically upward. On smooth surface, sphere will slide without rolling.

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