(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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?

2. Relevant 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]

3. 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!!

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Horizontal projectile, NOT GIVEN INITIAL VELOCITY

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