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An 85 kg man pushes a 32,000 ton wall for 240 seconds, but it does not move. How much work does he do on the wall?
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5 votes
An 85 kg man pushes a 32,000 ton wall for 240 seconds, but it does not move. How much work does he do on the wall?

User FrickeFresh
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3 votes
Work is force times distance, or W=Fd, so if d = 0 then work is also 0
User Bizzarrus
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3 votes
He does no work because there is no displacement. (W=0)
User Torbonde
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