Question

A stunt car drives off a 150m cliff at a speed of 45mph

. How long does it take the stunt car to reach the ground?

Answer 1

5.53 seconds.

Explanation:

The equation of motion is

d = 4.9t^2 so

150 = .9 t^2

t^2 = 150 / 4.9

t^2 = 30.612

t = 5.53 seconds.