True, converting one form of energy into another form always involves a loss of usable energy.
What is the law of conservation of energy?
According to the law of conservation of energy,Energy can neither be generated nor destroyed, but it may be transferred from one form to another.
Friction force is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N)
Mathematically, it is defined as the product of the coefficient of friction and normal reaction.
There are the lot of unusable energies like energy loss due to friction and vibration. True, converting one form of energy into another form always involves a loss of usable energy.
Hence, the given statement is true.
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