- #1
xannaxiero
- 10
- 0
Homework Statement
A cannon ball is fired horizontally off the top of a cliff that is
400 m high above the ocean. The ball hits the water 600 m
away. With what speed does the cannon ball enter the water?
Homework Equations
I've tried using
d[itex]_{x}[/itex] = u[itex]_{x}[/itex]*t
d[itex]_{y}[/itex] = u[itex]_{y}[/itex]*t + 1/2a[itex]_{y}[/itex]*t[itex]^{2}[/itex]
and also solving for t
t = [itex]\sqrt{2y/g}[/itex]
The Attempt at a Solution
So I found that t = 9 seconds
and that u[itex]_{x}[/itex] = 66.4
but i can't seem to figure out how to find final velocity, or speed.
I know what the correct answer is (111 m/s), I just can't figure out how it was gotten.
I have an exam in an hour, any help would be greatly appreciated!