1 A ball is released from rest at a height \(h\) metres above ground level. The ball hits the ground 1.5 seconds after it is released. Assume that the ball is a particle that does not experience any air resistance.
- Show that the speed of the ball is \(14.7 \mathrm {~m} \mathrm {~s} ^ { - 1 }\) when it hits the ground.
- Find \(h\).
- Find the distance that the ball has fallen when its speed is \(5 \mathrm {~ms} ^ { - 1 }\).