a man exerts 700 newtons of force to move a piece of furniture 4 meters. if it takes him 2 seconds to move the furniture, how much power does it require?

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29-11-2015
Physics

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a man exerts 700 newtons of force to move a piece of furniture 4 meters. if it takes him 2 seconds to move the furniture, how much power does it require?

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AL2006 AL2006 · Answer 1 · 2015-11-30T00:10:07+01:00

   Work = (force) x (distance)

The work he did: Work = (700 N) x (4m) = 2,800 joules

The rate at which
he did it (power):    Work/time = 2,800 joules/2 sec

      = 1,400 joules/sec

      = 1,400 watts

= 1.877... horsepower (rounded)