Question

why perfect or ideal machine not found in practice?​

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.

Explanation:

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Answer 2

Explanation:

A, B and C working together can plough a field in 24/5 days. A and C together can do it in 8 days. How long would B working alone take to plough the field?