Question

. When a ball is thrown vertically upwards, it reaches a maximum height of 5 meters. a. What was the initial speed of the ball? b. How much time is taken by the ball to reach the highest point? (g = 10m/s2)

Answer 1

use the formula of mgh and you'll find the answer

Answer 2

here maximum height H=u^2/2g
H=5 and g=10 therefore
5=u^2/2×10
100=u^2
a.u=10m/s
b.the formula to calculate time is
t=2u/g
t=2×10/10
t=2s