Question

Observe the diagrams I and II carefully. An object of mass m is
lifted from A to B to height h along path 1 and path What

would be the work done on the object in both the cases? Give
reasons for your answer.​

Answer 1

Answer:

mgh

Explanation:

Since both are at the same height,the work done would be mgh

Answer 2

The work done in both cases is the same and is equal to mgh.

• Work done by the body is the product of force and displacement.

W = F x d

where,

F is the force acting on the body which is "mg". If we consider the mass of the body to be (m).

d is the displacement.

• If we observe figure I and figure II we can conclude that even if the path is different the height raised in both cases is the same.
• As the work done depends on the displacement and not on the distance or path followed.
• Therefore, we can say that the work done for the same body of mass (m) raised to a height (h) is same.

W = F x d

= mgh

Hence, the work done is equal to mgh in both cases.