Question

A 62kg shell is shot from cannon.

What is the gravitational potential energy id tye shell reaches an450m height

What is the change in potential energy of the system when the shell falls to a height if 300m

Answer 1

The gravitational potential energy at 450 m is

$$GPE=mgh=273420\text{ J}.$$

When it drops 150 m, the energy is

$$\Delta GPE=mg\Delta h=91140\text{ J}.$$