State whether work id done or not when:
I) A man pushes a wall
II) A coolie stands with a box on the head for 15 minutes
III) A girl climbs up 20 stairs.
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Answered by
1
Answer:
In option A, while man is pushing wall,it will not have any displacement and hence, he is not doing any work.In option B, same situation and no work is ...
Answered by
1
Answer:
iii is the answer of the questions .......
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