Question

A pulley system gets 80Joules of work after 200Joules of work is put in. What is the efficiency of the pulley system.

Answer 1

ANSWER

$\begin{equation*} 40\% \end{equation*}$

EXPLANATION

The efficiency of the pulley system is given by:

$E=\frac{Output\text{ }work}{Input\text{ }work}*100$

Hence, the efficiency of the pulley system is:

$\begin{gathered} E=\frac{80}{200}*100 \\ E=40\% \end{gathered}$

That is the answer.