Using onlyHow do you calculate the launch speed of an object

[hailfire]

How do you calculate the launch speed of an object using only the distance it travels the angle of launch?
If there is an equation, I would be very happy if you could tell me what it is.
This is the only thing I need.

 

[The legend]

do you know the projectile equations?

 

[hailfire]

Yes, I do, I know it has to do with sin^2(theta)=2sin(theta)*sin(theta)
I just can't get this equation which would help get the average launch speed.

 

[The legend]

what is the projectile formula for range?

(i can't tell you the answer, as per rules of the forum)

 

[hailfire]

v^2-v^2=2a delta x

I know that this is purely based on volunteer work and help, but I would appreciate it if you don't draw this out. If you can get to the point, please do.

 

[hailfire]

or delta x=vt-(1/2)at^2

 

[The legend]

http://en.wikipedia.org/wiki/Range_of_a_projectile
hope it helps...

 

[hailfire]

haha, ****, why didn't i think of wikipedia.
Thanks man!

 

[hailfire]

No sarcasm there.

 

[hailfire]

Do I delete this thread?

 

[MysticDude]

Darn The legend beat me to it. But yeah basically just play around with that formula to get $$v_0$$.EDIT: Don't delete the thread( can you even do that?), were you able to get $$v_0$$? That is your goal, so what did you get for $$v_0$$?

 

[The legend]

just easy stuff, playin around with equations..
You are welcome, hailfire..

@MysticDude: yup, beat you to it! hehe