Sheepie
Sheepie Sheepie
  • 02-03-2018
  • Physics
contestada

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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ave24 ave24
  • 02-03-2018
He does no work because there is no displacement. (W=0)
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feynman135
feynman135 feynman135
  • 03-03-2018
Work is force times distance, or W=Fd, so if d = 0 then work is also 0
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