Amass of 10 kg is at a point a on the table. it 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

Work done by gravitational force = 0 joule

Explanation:

Work done is given by the relation

                        W  =  F   x    S   joule

Where,    F  -  the force applied in the form of push or pull

               S  -  displacement caused by the force

If a force is acting on a body and it doesn't cause any displacement, then work done will be zero.

Gravitational force acts on the body even if the body is at rest.

Work done by the gravitational is applicable only if there is some vertical component of motion involved.

In this case, some amount of work is done to move the body from point A to B.But, the body is displaced in the horizontal direction. No vertical motion is involved.

So, the work done due to gravitational force on a mass is zero joule.

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

3.2x10^7