Question

A man has a box of weight 20 kg. The energy of the box when he holds the box in his hand for 5 minutes is ______.

विकल्प

• 100 J

• 200 J

• 400 J

• zero

Answer 1

A man has a box of weight 20 kg. The energy of the box when he holds the box in his hand for 5 minutes is zero.

Explanation:

The box is held at rest, so there is no displacement.

W = F × s

Since,

s = 0

W = 0

Therefore, no mechanical work is done on the box, so the energy transferred to it is 0 J.