Using a simple machine, a person put in 54.0 J of work output was 50.1 J. Calculate the efficiency of the simple machine.

The efficiency of a machine can be calculated using the formula:

Efficiency = (Work output / Work input) x 100

Given that the work output is 50.1 J and the work input is 54.0 J, we can substitute these values into the formula:

Efficiency = (50.1 / 54.0) x 100 = 92.78%

Therefore, the efficiency of the simple machine is approximately 92.78%.