Question

 A man holds an object of mass 20 kg at a height of 2 m for 20s. What is the work done in holding the object? ​

Answer 1

Answer:

A body of mass 20 kg is held at a height of 2 m above the ground means there is no displacement because of which there is no change in its potential energy. Hence work done is zero.

Answer 2

From question, we have;

• The man is just holding the object,but we know that;

Work done = Force × Displacement

• But their is no displacement of the object thus the work done will be zero.

W = F × D

W = F × 0

W = 0

Therefore, the work done will be zero.

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