- A small ball of mass 0.3 kg is released from rest from a point 3.6 m above horizontal ground. The ball falls freely under gravity, hits the ground and rebounds vertically upwards.
In the first impact with the ground, the ball receives an impulse of magnitude 4.2 Ns . The ball is modelled as a particle.
- Find the speed of the ball immediately after it first hits the ground.
- Find the kinetic energy lost by the ball as a result of the impact with the ground.