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Question

Assertion :Mechanical energy is the sum of macroscopic kinetic and potential energies. Reason: Mechanical energy is that part of total energy which always remain conserved.

A
Statement -1 is false, Statement-2 is true
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B
Statement -1 is true, Statement-2 is true; Statement -2 is a correct explanation for Statement-1
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C
Statement -1 is true, Statement-2 is true; Statement -2 is not a correct explanation for Statement-1
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D
Statement -1 is true, Staternent-2 is false
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Solution

The correct option is D Statement -1 is true, Staternent-2 is false
Mechanical energy=K.E+P.E
According to law of conservation of energy total energy is conserved not mechanical energy ,it can change into other forms of energy during any process like thermal ,nuclear,electromagnetic etc.

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