Question

A box with a mass of 14.8 kg sits on the floor. How high would you have to lift box to for it to have a gravitational potential energy of 355 J?

Answer 1

`2.45m`

Explanation:

`E = mgh`

where `E` is the gravitational potential energy, `m` is the mass of the box, `g` is the gravitational field strength (`9.81` on earth) and `h` is the height.

The question asks us about height, so

`h = E/(mg) = 355/(14.8 xx 9.81) = 2.45m`