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

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Detailed Solution

A mass of

10 kg

is at a point

A

on a table. It is moved to point

B

. If the line joining

A

and

B

is horizontal, the work done on the object by the gravitational force is

0

.
When a force is applied to an object, movement of that object is said to have occurred.
The only factor affecting the work that gravity does is the body's vertical displacement.
It is independent of the body's trail.
Therefore, the expression gives the amount of work done by gravity.
Gravitational force acts in a vertically downward direction, while displacement is in a horizontal direction. Since displacement is perpendicular to the force applied, the work done is zero.