Question

Output work is always less than input work why?

Answer 1

Explanation:

Output work is always less than input work because some amount of input work is always wasted due to friction in the movable parts of the machine.

Answer 2

Answer:

output work is always less than the input work because some work is done to overcome the frictional forces in the machines because of which the amount of energy gets converted into heat and sound energy which causes wear and tear of machine parts..

Explanation:

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