If a machine uses 600J of work to accomplish 300J of work, what is the efficiency?
To find the efficiency of the machine, we use the formula:
Efficiency = (Output / Input) x 100%
In this case, the input is the work done by the machine which is 600J and the output is the work accomplished by the machine which is 300J.
Efficiency = (300J / 600J) x 100%
Efficiency = 0.5 x 100%
Efficiency = 50%
Therefore, the efficiency of the machine is 50%.