(a) mass = 80kg
height h= 2km
the potential energy at the peak of the mountain= mgh=80*9.8*2000=1568000J
therefore the potential energy at the peak of the mountain is 1568000J
(b) Work done in reaching the peak will be equal to the change in potential energy = 1568000)
therefore the work done is 1568000J
(c) Power is given by
P=W/t=1568000/(30*60)=871.11W
therefore the Power is 871.11W
The work done by force can be defined as the product of the displacement of an object and the component of the applied force acting in the direction of the displacement of the object.
Potential energy is stored energy that depends on the relative position of different parts of the system. Springs have more potential energy when compressed or stretched. Steel balls have more potential energy to be lifted across the ground than after they have fallen to Earth.
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