Let us assume that you have lifted a suitcase and kept it on a table. On which of the following does the work done by you depend or not depend? Why?

a) The path taken by the suitcase.

b) The time taken by you in doing so.

c) The weight of the suitcase.

d) Your weight.

Work Done = Force Displacement

a) It doesn’t depend on the path taken because work done depends upon the displacement i.e Final Position and Initial Position.

b) It doesn’t depend upon time taken, work only depends upon force and displacement.

c) It does depend upon the weight of suitcase because the suitcase is raised against the gravitational force with a minimum force equal to the weight of body .

d) It doesn’t depend on my weight as while lifting the suitcase gravitational force doesn’t act against my weight and I don’t move against gravitational force.