Q104 / 180 · AIIMS 2001 · Physics

Assertion : Centripetal force does no work. Reason : Force and displacement are perpendicular to each other.

  • Correct answer
    A
    If both $A$ and and Reason are true and Reason is the correct explanation of Assertion.
  • B
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  • C
    If Assertion is true but Reason is false.
  • D
    If Assertion is false but Reason is true.

Solution

Since centripetal force is perpendicular to the displacement of the body, work done is zero as $$ W=\vec{F} \cdot \vec{d}=F d \cos \theta $$

Hence, the correct answer is option: 'A'.

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