Question

A ball of maass 200g fall from a height 5m . What is its kinetix energy when it just reaches the ground. ( g=9.8 m/s2

Answer 1

According to the law of conservation of energy, the total energy is conserved.
So total energy at the highest point = Total energy at lowest point
Only potential energy (ball at rest) = Only kinetic energy (PE = 0 as h = 0)
m g h = KE
0.2 kg x 10 m/s​2 x 5m = KE  [you can calculate the final answer yourself now, all the best!]