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Question

A man carries a heavy box on his head on a horizontal plane from one place to another. In this case, he does

A
Maximum work
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B
No work
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C
Negative work
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D
Minimum work
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Solution

The correct option is B No work
A man carrying a box on his head:–––––––––––––––––––––––––––––––––––
In this case, the force acting on the man is the weight of the box, which is acting downwards.
The displacement of the man is along the horizontal direction.
Therefore, the force and the displacement are perpendicular to each other. So there is no work involved in this process.

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