Question

A ball is thrown horizontally from the top of a vertical tower and strike the ground at point 50m from the bottom of the tower given that the height of the tower is 45m, determine the;

1. Time taken by the ball to hit the ground. 
2. The initial horizontal velocity of the ball. 
3. Vertical velocity of the ball just before striking the ground (Take g=10m/s⁻²)

Answer 1

1. Since u=0 s = ½ gt² =>
   45 = ½ x 10 x t² => t = 3s
2. S = ut 50 = u X 3 => u = 16.7m/s
3. v = u + gt = 0 + 10 x 3 = 30m/s