Give reasons:

A machine cannot be 100 percent efficient.

Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM

Expert Answer:

A machine cannot be 100 percent efficient because output of a machine is always less than input. A certain amount of work done on a machine is lost to overcome friction and to lift some moving parts of the machine.

Answered by  | 4th Jun, 2014, 03:23: PM