1.

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

Answer»

(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) No.



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