A stone is dropped from the top of a tower of height 11 .25m. Calculate the time it will take to reach the ground. [g = 10ms-2]

Teepha10

6 years ago

From the eqn of motion
S = ut + 1/2 gt^2
s = 11.25
u = 0
g = 10
t = ?
11.25 = 0t + 1/2 10t^2
11.25 = 5t^2
t^2 = 11.25/5
t = 1.5

Korede2002

6 years ago

U= root (2gh) also U= gt; gt = root(2gh); then solve