Tito and Michael put 1200 joules of work into pushing a box up a ramp, but only 300 joules of work is output for moving the box. What is the efficiency of the ramp?
a
4 %
b
360,000 %
c
.25 %
d
25 %
d) 25%
Efficiency = (output work / input work) x 100%
In this problem, the output work is 300 joules and the input work is 1200 joules.
Efficiency = (300 / 1200) x 100% = 0.25 x 100% = 25%