A team of students builds a lever as a science project. They expend 10, 300 Joules of energy to lift some bricks with the lever. If 6,283 Joules of energy are applied to the bricks, what is the lever's efficiency? (1 point)
Responses
39%
39%
164%
164%
0.61%
0.61%
61%
The lever's efficiency is 61%.
Efficiency = (useful energy output / total energy input) x 100
Efficiency = (10,300 / 6,283) x 100
Efficiency = 0.61 x 100
Efficiency = 61%