Projectile Motion (Guy commiting suicide)

[maxtheminawes]

Homework Statement

Bob has reached the special time in his life and runs horizontally off the edge of a cliff at 4.2 m/s. If the top of the cliff is 110m above the surface of the ocean, how long does it take Bob to reach the water?

Homework Equations

Y=Vot+1/2at^2
Y=height
t=time
Vo=initial velocity

The Attempt at a Solution

-110=0+1/2(-9.8)t^2
t= sqrt of((-110)/(1/2(-9.8)))
t=4.74secs

 

[ehild]

This is morbid. I hope Bob can swim, and also he has got secretly a parachute, just for the case he changes his mind during the fall. He has enough time, that you calculated correctly.

ehild