# Homework Help: Finding an angle of a projectile for a specific distance

1. Jan 18, 2010

### trexmatt

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

A fire hose held near the ground shoots water at a speed of 6.5 m/s. At what angle(s) should the nozzle point in order that the water land 2.0m away. Why are there two different angles?

2. Relevant equations

3. The attempt at a solution

I'm not sure how to go about solving this. I've gotten as far as this (calling the angle x)

Vy = Vosinx and Vx = Vocosx

Any help would be much appreciated, I don't understand where to go from here. It seems like none of the equations are going to go anywhere.

Thank you very much for your time...

2. Jan 18, 2010

### tiny-tim

Welcome to PF!

Hi trexmatt ! Welcome to PF!

(have a theta: θ and try using the X2 tag just above the Reply box )
Yes, those are the equations to use

(except don't use x for two different things!! )

Now treat the x and y directions separately (a = -g for y, a = 0 for x), to get a pair of equations involving θ, from which you can then eliminate t.