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?
Efficiency = Output work/Input work X 100%
a
4 %
b
360,000 %
c
.25 %
d
25 %
Efficiency = Output work/Input work X 100%
Efficiency = (300 J/1200 J) X 100%
Efficiency = 0.25 X 100%
Efficiency = 25%
Therefore, the efficiency of the ramp is 25%.
Option d is the correct answer.