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How much work does it take for a 75-kg person to climb the 9000 meters from sea level...

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quddoos | Valedictorian

Posted August 22, 2013 at 4:35 AM via web

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How much work does it take for a 75-kg person to climb the 9000 meters from sea level to the peak of mount everest ? how much potentional energy would this person have when he or she reached the summit ?

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justaguide | College Teacher | (Level 2) Distinguished Educator

Posted August 22, 2013 at 4:47 AM (Answer #1)

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The gravitational potential energy of a body placed at a height h above the surface is equal to PE = m*g*h where m is the mass of the body and g is the acceleration due to gravity.

The peak of Mount Everest that is a height of 9000 m. The potential energy of a person with mass 75 kg at this height is equal to 75*9.8*9000 = 6615 kJ

In an ideal case scenario, with efficiency at 100%, the work required to be done to reach the peak of Mount Everest is equal to the increase in net change in potential energy. This is 6615 kJ.

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