4 You should neglect air resistance in this question.
A small stone is projected from ground level. The maximum height of the stone above horizontal ground is 22.5 m .
- Show that the vertical component of the initial velocity of the stone is \(21 \mathrm {~ms} { } ^ { 1 }\).
The speed of projection is \(28 \mathrm {~ms} { } ^ { 1 }\).
- Find the angle of projection of the stone.
- Find the horizontal range of the stone.