Question

A machine is said to be ideal if its efficiency is:​

Answer 1

Answer:

A simple machine, such as a lever, pulley, or gear train, is "ideal" if the power input is equal to the power output of the device, which means there are no losses. In this case, the mechanical efficiency is 100%.

Answer 2

A machine is said to be ideal if its efficiency is 100%.

• A machine can be called an ideal or perfect machine when it provides an efficiency of 100%.
• Since efficiency is defined as the output divided by input, for a machine, which is having 100% efficiency, we can say that the output we obtain is equal to the input we have provided to the machine.
• Further, when a machine is 100% efficient, or ideal, then, no part of the work which is done on the machine, gets wasted. Thus, the whole of the energy provided as input to the machine is converted, without any loss, into useful work as output.