A ball of mass 1000g drops from a height of 5m and rebounded to a height of 2.5m. Calculate

Question

I. It's kinetic energy before impact
ii. It's initial rebound ,velocity and kinetic energy

Answer 1

1. KE before impact=mgh=1kg*9.8N/kg*5m
2. initial rebound energy= mgh=1kg*9.8N/kg*2.5m
velocity? find from 1/2 m v^2=initial rebound energy solve for v