A body of mass m moving around a circle of radius r with a uniform...
PHYSICS
WAEC 2018
A body of mass m moving around a circle of radius r with a uniform speed v experiences a centripetal force F. The work done by the centripetal force on it is
- A. Fv
- B. zero
- C. Fmr
- D. Fr/m
Correct Answer: B. zero
Explanation
Work is done whenever the given conditions are satisfied. (ii) there is a displacement of the body caused by the applied force along the direction of the applied force. No displacement takes place in this case. So, work done by a centripetal force is always zero. The work done by centripetal force in the case of a uniform circular motion is 0 joules.
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