# What is the gravitational potential energy of a  11 kg object on a shelf  6/5 m  high?

Jan 1, 2016

129.492 Joules

#### Explanation:

The work done to raise an object from the ground is equal to its gravitational potential energy, given by:

$U = m g h$

where,

$U$ is the gravitational potential energy
$m$ is the mass of the object
$g$ is the acceleration due to gravity $= 9.81 \frac{m}{s} ^ 2$ for the earth
and $h$ is the height to which the object is raised.

Therefore, the gravitational potential energy,

$U = 11 \cdot 9.81 \cdot \frac{6}{5}$

$= 129.492 J$