Question

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

Answer 1

`1136.8Nm`

Explanation:

Gravitational potential energy is given by

`G.P.E. = mgh`

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 `29kg`, `a` is always around `9.8ms^-2` on Earth, and `h` is `4m`, so

`G.P.E.=29kg*9.8ms^-2*4m`
`=1136.8kgm^2s^-2`
`=1136.8Nm`