Question

What is the gravitational potential energy of a `1 kg` object on a shelf `1/8 m` high?

Answer 1

`1.225` Joules

Explanation:

Potential energy `PE` is given by `m*g*h` where `m` is mass in kg, `g` is acceleration due to gravity `9.8m/s^2` and `h` is height in meters.

Hence `PE` is `1*1/8*9.8` or `1.225` Joules.