A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.

Answer

The work done on the object by the gravitational force is 0.

Explanation

Here, the displacement AB is horizontal. So, there is no difference in height.
`therefore h=0`. The gravitational force, acts vertically downwards.
`w=mgh` (`because` Here, W = the work done by gravitational force)
`=mgxx0=0`