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Conservation of energy

According to this principle, energy can neither be created, nor can be destroyed. It only changes from one form to another.

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The total mechanical energy, i.e. sum of kinetic and potential energy, remains constant.

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The total mechanical energy, i.e. sum of kinetic and potential energy, remains constant.

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The step by step theoretical verification of conservation of mechanical energy.

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Conservation of mechanical energy in motion under gravity graph.

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Conservation of mechanical energy in motion under gravity graph.

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Q. What is the initial velocity 'u' required to reach a height 'h' ?

Ans: Initial K will be equal to final U, as per conservation of mechanical energy.
Hence: 1/2 mu2   =   mgh

Or u  =   square root of (2gh)

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Conservation of energy in a simple pendulum

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Experimental demonstration of law of conservation of energy....This professor took great risk, but we should trust Physics, shouldn't   we? 😊   Have a watch.