(a(i))[2]
Show that the ball's downward speed on impact is $19.0\,\text{m s}^{-1}$.
(a(ii))[2]
Calculate, to three significant figures, how far the ball falls before it reaches the ground.
(b(i))[4]
The ball is in contact with the ground for $12.5\,\text{ms}$ and then rebounds with an upward speed of $18.6\,\text{m s}^{-1}$. The ball has a mass of $46.5\,\text{g}$. Calculate the average force on the ball during impact with the ground. State both the size and the direction of the force.
(b(ii))[2]
Use conservation of energy to find the greatest height the ball attains after striking the ground.
(c)[1]
State and explain whether the collision of the ball with the ground is elastic or inelastic.