JAMB - Physics (1978 - No. 4)

A palm fruit dropped to the ground from the top of a tree 45m tall. How long does it take to reach the ground? (g = 10ms-2)
9s
4.5s
6s
7.5s
3s

Explanation

Using the equation of motion

S = ut + \(\frac{1}{2}\)at2

45 = (0 x t) + (\(\frac{1}{2}\) x 10 x t2)

t = 3s

Comments (0)

Advertisement