Question

Assertion (A) : No work is done by the centripetal force acting on a body moving along the circumference of a circle.
Reason (R) : At any instant, the motion of the body is along the tangent to the circle whereas the centripetal force is along the radius vector towards the centre of the circle.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A)
• B. Both (A) and (R) are true and (R) is not the correct explanation of (A)
• C. (A) is true and (R) is false
• D. (A) is false and (R) is true

Answer 1

The correct option is A Both (A) and (R) are true and (R) is the correct explanation of (A)

$\overrightarrow{F}.\overrightarrow{ds}=0$ as $\overrightarrow{F}$ and $\overrightarrow{ds}$ are mutually perpendicular.