# What is the gravitational potential energy of a  29 kg object on a shelf  4 m  high?

##### 1 Answer
Apr 17, 2016

$1136.8 N m$

#### Explanation:

Gravitational potential energy is given by

$G . P . E . = m g h$

where $m$ is mass, $g$ is acceleration of gravity and $h$ is height or distance between the two bodies.

In this case, $m$ is given as $29 k g$, $a$ is always around $9.8 m {s}^{-} 2$ on Earth, and $h$ is $4 m$, so

$G . P . E . = 29 k g \cdot 9.8 m {s}^{-} 2 \cdot 4 m$
$= 1136.8 k g {m}^{2} {s}^{-} 2$
$= 1136.8 N m$