Question 9
Work, Energy and PowerA body is under the action of a force F such that the force – displacement graph of the body is semicircular as shown above. The work done on the body by the force in moving through 24 metres is
- A.36π J
- B.72π J
- C.144π J
- D.288π J
Show the answer and explanation
Answer: B (72π J)
Explanation
Work = area under the graph = area of a semicircle of radius 12 = ½π × 12² = 72π J.