- #1
szimmy
- 35
- 4
Homework Statement
For a lab that we did I need to draw the path of a horizontally fired projectile using a graph. When I look at the equation I derived it doesn't look like it will draw the path correctly.
The Attempt at a Solution
Δx = Vox*t
T = Δx / Vox
-h = Voy*t + .5*a*t2
-h = Voy*(Δx / Vox) + .5*a* (Δx / Vox)2
-h = 0 * (Δx / Vox) + .5*-g*(Δx2 / Vox2)
-h = -g/2 * (Δx2 / Vox2)
h = (g*Δx2)/ (2*Vox2)
h = (g)/ (2*Vox2) * Δx2
y = (g)/ (2*Vox2) * x2
y = c*x2
c = (g)/ (2*Vox2)
h being the height the projectile was fired from above the ground. This looks almost right, but shouldn't I have a negative somewhere in my constant? The shape it should draw is the right half of an upside down parabola, should I not have used -h even though the projectile is moving under the starting point? Any help would be greatly appreciated, I'm a bit puzzled at this point.