Question

A body moves from point A to B under the action of a force, varying in magnitude as shown in the figure. Force is expressed in newton and displacement in meter. What is the total work done?

Options

• 37.5 J

• 100 J

• 12.5 J

• 22.5 J

Answer 1

22.5 J

Explanation:

Total work done w = area covered under F - S graph

`= 1 xx 10 + 1 xx 10 + 1/2 xx 1 xx 5 + 1/2 xx 1 xx 15 + 1/2 xx 1 xx (- 15)`

= 22.5 J