Question

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

Answer 1

129.492 Joules

Explanation:

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

`U=mgh`

where,

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

Therefore, the gravitational potential energy,

`U=11*9.81*6/5`

`=129.492J`