Question

W
PUPUD
Juli uo
5. What do you understand by an ideal machine ? How
does it differ from a practical machine ?
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Answer 1

An ideal machine is a machine whose efficiency is 100% , i.e. in that machine no work is lost in the form of heat between parts or dune to friction...work input = work output...

It differs from the practical machine in the respect that practical machine always has efficiency less than 100%, since there is always some energy lost in the form of heat or other forms...thus work output is not equal to work input