A man is using a pulley to raise a weight. He is applying 45 joules of energy to pull on that rope and 44.325 joules of energy
are being used to lift the weight. What is the efficiency of the pulley?
98.5%
.675 Joules
98.325 joules
1.015%
Efficiency is calculated by dividing the useful output energy by the total input energy and multiplying by 100.
Total input energy = 45 joules
Useful output energy = 44.325 joules
Efficiency = (44.325 / 45) * 100 ≈ 98.5%
Therefore, the efficiency of the pulley is 98.5%.