A lead ball with mass 2 kg is dropped from a height of 3 m. What is its kinetic energy just before it hits the ground?

A lead ball with mass 2 kg is dropped from a height of 3 m. What is its kinetic energy just before it hits the ground? Z A ball of mass 0.25 kg is thrown straight up with initial velocity 2.0 m/s. What maximum change in potential energy does it achieve?