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Question

Choose the principle which is NOT used in the solution making of the problem related to friction.

उस सिद्धांत का चयन करें जिसका उपयोग घर्षण से संबंधित समस्या के समाधान बनाने में नहीं किया जाता है।

A.

Principle of conservation of energy

B.

Principle of work and energy

C.

Principle of conservation of momentum

D.

D’ Alembert’s principle

Answer ( Option A)

Principle of conservation of energy

Solution

Some part of energy is wasted (in form of heat, sound etc.), due to friction which is difficult to recover. Hence, the principle of conservation of energyis not used in the solution making of the problem related to friction.

Hence, the correct option is (A).

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