Question

A block and tackle system has 5 pulleys. If an effort of $1000N$ is needed in the downward direction to raise a load of $4500N$, calculate the mechanical advantage.

Answer 1

Given:
The block and tackle system consists of 5
pulleys, i.e. $n=5$
Effort, $E=1000N$
Load, $L=4500N$
Mechanical advantage
$M.A.=\frac{load\left(L\right)}{effort\left(E\right)}$
$=\frac{4500N}{1000N}$
$=4.5$