# A pulley with a mechanical advantage of 5 is used to lift a bucket weighing 285 N. How much force must be used to lift the bucket?

Oct 2, 2015

$57 N$

#### Explanation:

$\text{Mechanical Advantage" = "output force"/"input force}$
Here, Output Force is the weight of the bucket, $285 N$, and Input Force is the force needed to lift it.

$\implies \text{Input Force}$ $=$ $\text{output force"/"mechanical advantage}$
$= \frac{285}{5}$
$= 57 N$