A ball of mass 5kg is kept at a height of 20metres of above the ground calculate the following.
a)What is its potential energy at that height.
b). What's is its potential energy and kinetic energy when it is allowed to fall freely. when it is allowed to fall freely to half height.
c)What is its potential energy and kinetic energy just before touching the ground.
d)Calculate the with which it touch the ground
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Answer:
a) potential energy= MGH
5x9.8x20
100x9.8
980
Answer: