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How much work would it take for a 75-kg person to climb the 9000 meters from sea...
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We know that Work done=Force*displacement.
To lift oneself up by climbing, one has to exert a force equal to one's own weight.
We know that weight=m*g. so,
Here, m=75kg, g=9.81m/s^2 and d=9000 m.
Plugging in the values we get:
Also gain in potential energy=m*g*h
Hence, work done by the person is the same as the gain in his potential energy=6621750 J.
Posted by llltkl on July 23, 2013 at 10:23 AM (Answer #1)
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