Question

why cannot a machine be an ideal machine​

Answer 1

Answer: In ideal machines , all the input energy should be converted to output energy . But , some part of energy is always lost in overcoming friction and input energy is always greater than output energy . Hence , no machine is ideal

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Answer 2

Answer:

Ideal machine output is equal to its input

Explanation:

so by these..... whereas in practical machine output is not equal to its input. Whereas an actual machine, the output energy is always less than the input energy that is there is some loss of energy...