A man lift a 3kg box upward to height of 2m
1-what is the work done by the man
2- is the work , positive , negative,or zero (explain)
3- if the man stayed for 10min holding the box how much work did he do?
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Answer:
3.
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Answer:
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Explanation:
1. work done = wgh = 3*10*2
=60 J
2. zero
3.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.
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