# How much work does it take to raise a 7 kg  weight 9 m ?

##### 1 Answer
Apr 2, 2016

$617.4 J$

#### Explanation:

Assuming it is raised vertically on or near earth, the work done is equal to the potential energy gained.

$W = {E}_{p} = m g h$

$= 7 k g \times 9.8 m / {s}^{2} \times 9 m$

$= 617.4 J$