Question 1 Report

A machine is used to lift a load of 20 N through a height of 10 m. if the efficiency of the machine is 40%, how much work is done?

Answer Details

Efficiency = work outputwork input×1001 $\frac{\text{work output}}{\text{work input}}\times \frac{100}{1}$

= 40 = 20×10x×1001 $\frac{20\times 10}{x}\times \frac{100}{1}$= 500J