Question

What is an ideal machine?

Answer 1

Ideal machine :

1. A machine is said to be ideal if the work output of the machine is equal to the work input of the machine.
2. The efficiency of an ideal machine is always equal to unity.
3. No amount of input work is wasted in an ideal machine to overcome friction etc.
4. $$\begin{gathered} Weknowthat,Efficiencyofamachine=\frac{workoutput}{workinput} \\ Foranidealmachine,workoutput=workinput \\ So,Efficiencyofanidealmachine=1 \end{gathered}$$