Question

state the law of conservation of energy? show that when a body falls from a certain height the total mechanical energy remains conserved in long way
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Answer 1

we can say that energy can neither be created nor destroyed. In the case of a freely falling body, it is the mechanical energy of the system that is conserved. Mechanical energy (E) is the sum of the potential energy (U) and the kinetic energy (K) of the freely falling body. Therefore, E=K+U=constant.

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