WAEC - Physics (1988 - No. 8)
A ball is thrown vertically upwards from the ground with an initial velocity of 50ms-1. What is the total time spent by the ball in the air? (g = 10ms-2)
2.5s
5.0s
10.0s
15.0s
20.0s
Explanation
Time to move up:
V = U - gt
0 = 50 - 10t
t = 5.
Total time spent on air = 2t = 10.0s
V = U - gt
0 = 50 - 10t
t = 5.
Total time spent on air = 2t = 10.0s