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Mechanics: Efficiency of the Machine

A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What is the efficiency of the machine?
a. 92 percent
b. 94 percent
c. 96 percent
d. 97 percent?

Solution Summary

The efficiency of the machine can be found by dividing the useful work by the supplied energy.