- #1
Computerguy
- 5
- 0
I have been working this one all day. No luck as far.
The question:
A projectile is launched at an angle of 53.1° with respect to the horizontal, as shown in Figure 2-34. ( Ill try to give you a picture of example 2-34) It strikes a target that is 120m away horizontally and 160m below the launching point. Find the initial speed of the projectile. Assume g=10m/s^2.
the photo should be in an attachment somewhere.
I would normally split this into several questions. But sadly that didn't help me much.
As far as i know i have theta and the distance in the X dirextion.
I have tried all my kinematic equations but they all want to have Time.
Accept for V^2=Vo^2+2a(X-Xo)
I try to use it. V=0 Vo= Unkown 2a(X-Xo) cancel due to no gravity in the x direction.
So basicly 0=Vo^2 hahaha
From research on the internet i heard there was a Range Formula.
x=Vo^2(sin2θ)/g
Sadly that only applies for flat surfaces. Also Why would g be there? There is no g in the x direction as far as i can tell.
At last i found the full equation.
x = Vo cosθ (Vo sinθ + √Vo^2 sin^2θ + 2g Yo )/g
Any suggestions? How do i find Distance in the y direction?
Thanks
The question:
A projectile is launched at an angle of 53.1° with respect to the horizontal, as shown in Figure 2-34. ( Ill try to give you a picture of example 2-34) It strikes a target that is 120m away horizontally and 160m below the launching point. Find the initial speed of the projectile. Assume g=10m/s^2.
the photo should be in an attachment somewhere.
I would normally split this into several questions. But sadly that didn't help me much.
As far as i know i have theta and the distance in the X dirextion.
I have tried all my kinematic equations but they all want to have Time.
Accept for V^2=Vo^2+2a(X-Xo)
I try to use it. V=0 Vo= Unkown 2a(X-Xo) cancel due to no gravity in the x direction.
So basicly 0=Vo^2 hahaha
From research on the internet i heard there was a Range Formula.
x=Vo^2(sin2θ)/g
Sadly that only applies for flat surfaces. Also Why would g be there? There is no g in the x direction as far as i can tell.
At last i found the full equation.
x = Vo cosθ (Vo sinθ + √Vo^2 sin^2θ + 2g Yo )/g
Any suggestions? How do i find Distance in the y direction?
Thanks