Question

A person holds a body mass 20 kg over his head for 10 seconds he has done any work ? Justify your answer.

Answer 1

Answer:A person holds a body of mass 20 kg for 10sec over his head but he has not done any work because there is no displacement in his body

Explanation:

Answer 2

A person holds a body mass 20 kg over his head for 10 seconds then the work done is zero.

Why there is no work done?

• When a person holds 20 kg mass over his head then the displacement is zero so there is no work done
• The potential energy does not change when a person is standing
• The work is not done because no displacement occurs
• When a person holds a body no work is done because their potential energy does not change
• The mass and weight of the person does not change when no work is done by the person