Question

(i) In what way does an 'Ideal machine' differ from a 'Practical machine'?(ii) Can a single machine act as a force multiplier and a speed multiplier at the same time?

Solution

(i) The efficiency of an ideal machine (free from friction etc) is equal to $$1$$. But in actual practical, the efficiency is less than $$1$$ due to the energy loss in friction.(ii) A single machine cannot act as a force multiplier and a speed multiplier at the same time.Physics

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