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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 ______.
Options
100 J
200 J
400 J
zero
MCQ
Fill in the Blanks
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Solution
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.
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