Question

A box has a mass of 5.8 kg. The box is lifted from the garage floor and placed on a

shelf. If the box gains 245 J of potential energy, how high is the shelf?

Answer 1

Potential energy

P E=mgh

$h=\frac{PE}{mg}$

Put value

$h=\frac{245}{5.8\times9.8}=4.31m$