Question

prove how net energy of any system is always constant​

Answer 1

answer-->> The law of conservation of energy says “Energy can neither be created nor be destroyed.” So, it means, that, under a conservative force, the sum total of an object's kinetic and potential energies remains constant.

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Answer 2

The law of conservation of energy says “Energy can neither be created nor be destroyed.” So, it means, that, under a conservative force, the sum total of an object's kinetic and potential energies remains constant.