question_answer

A force acts on a body along its direction of motion. The graph given, show the relation between force and displacement. Find the work done by the force.

Answer:

The area of the curve drawn between force and displacement gives the work done. From the graph, base\[=14-2=12\,m\]    height = 60 m \[h=\frac{784}{20\times 9.8}=4m\] Work done = area of the triangle \[=\frac{1}{2}\times base\times height\] \[=\frac{1}{2}\times 12\times 60=360J\]