Question

a machine is an ideal machine if it's efficiency is:
1
less than 1
more than 1
none of these​

Answer 1

Answer:

1

Explanation:

A machine whose efficiency is 1 or 100% is known as ideal or perfect machine, but there aren't any ideal machines in the world, because ideal machines no part of the work done is wasted, so, like these there are no machines, as some part of the work done is wasted in overcoming the friction.