What is the efficiency of a pulley if 5000 joules of energy results in 3000 joules of work? Please show your calculations.
To calculate the efficiency of a pulley, we need to divide the useful output energy (work output) by the input energy (work input) and multiply it by 100 to express it as a percentage.
Efficiency = (Useful output energy / Input energy) * 100
Given:
Useful output energy (work output) = 3000 joules
Input energy (work input) = 5000 joules
Efficiency = (3000 / 5000) * 100
Efficiency = 0.6 * 100
Efficiency = 60%
Therefore, the efficiency of the pulley is 60%.