Question

A rock is dropped from a bridge and hits the water 3.2 seconds later. how high is the bridge?

Answer 1

Answer: 50.2272 meters

Reason:
For this question, we can use the linear motion equation that is as follows:
s = ut + 1/2at^2

From the question, we can gather that:
a = 9.81m/s^2
t = 3.2s
u = 0
s = displacement/distance travelled

Therefore,
s = 0 + (1/2 x 9.81 x 3.2^2)
= 50.2272 meters