Question

A backpack has a mass of 8 kg. It is lifted and given 54.9 J of gravitational potential energy. How high is it lifted?

Answer 1

height = 0.7m

Explanation:

`E_p=mgh`

`54.9=8xx9.8xxh`

`h=54.9/(8xx9.8)`

`h=0.70` meters or `70`cm