Mechanical Energy is conserved under?

Conservative system of forces

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disipative forces

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(A) and (B)

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none of these

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Solution

The correct option is C (A) and (B)
Solution :
If only internal forces are doing work (no work done by external forces), then there is no change in the total amount of mechanical energy then the total mechanical energy is said to be conserved. The option satisfying the given definaton are A and B.

The Correct Opt = C

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