Multiple choice

The work done by a body moving in a circular path is _____.

  1. force x circumference of the circle

  2. force x diameter of the circle

  3. force x area of the circle

  4. zero

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In uniform circular motion, centripetal force is always perpendicular to instantaneous displacement. Work = force × distance × cos(90°) = force × distance × 0 = zero.

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