WAEC - Physics (1991 - No. 6)
An orange fruit drops to the ground from the top of a tree 45m tall. How long does it takes to reach the ground? (g = 10ms-2)
3.0s
4.5s
6.0s
7.5s
9.0s
Giải thích
s = ut + \(\frac{1}{2}gt^2\)
45 = 0 + 5t2
t = 3s
45 = 0 + 5t2
t = 3s