An acceleration of a freely falling body (9.8m/s^2) to ft/s^2

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

Could someone . i have tried to solve myself but my calculation is off

The softest and hardest minerals are: softest hardest