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Question

If the output work of a simple machine is ________ than the input work, the machine is said to have less than 100% efficiency.

Answer 1

When output = input, efficiency = 100%

When output < input, efficiency < 100%

When output > input, efficiency > 100%

Answer 2

less

 

A 100% efficiency machine, otherwise known as the perpetual motion machine, is a theoretical device that outputs as much work as is input. This has yet to be invented. Therefore, every machine is less than 100% efficient and outputs less work than is input.

 

Ben