Question

A ball of mass 0.1kg is thrown vertically upwards with an initial velocity of 80m/s. Calculate the potential energy
1)halfway up
2)at its maximum height.
What is its kinetic energy as it leaves the ground??

Answer 1

1)

$$E_p'=0.5K=160\ J$$

2)

$$E_p=K=320\ J$$

3)

$$K=0.5(0.1)(80)^2=320\ J$$