Question

A cannon is fired horizontally

from a 5.0 m tall tower. How much time will it take until the projectile hits the ground?

Answer 1

1.0 s

Step-by-step explanation:

How fast the projectile is traveling HORIZONTALLY has no effect on how long it takes to hit the ground......only the initial height (5 m) and gravity (-9.81 m/s^2) will affect how long it takes to do so...

df = final position = 0 when it hits the ground

df = do + vot + 1/2 a t^2

0 = 5 + 0 t - 1/2 (9.81) t^2

5 = 1/2 (9.81) t^2

t = 1.0 s