Answer:
The projectile motion equation, defined as [tex]D=\sqrt{x^2+y^2} \\x=Vx*t+\frac{1}{2} Axt^2\\y=Vy*t+\frac{1}{2}Ay*t^2[/tex] where D is distance from the observer, x and y are horizontal and vertical positons respectevly, Vx and Vy are vector components of velocity V, and Ax and Ay are acceleration vector components, with t representing time. It is useful in balistics, and can be used to find position of an object when there is an acceleration both vertically and horizontally, or in a situation where there is an acceleration either vertically or horizontally with a velocity not being horizontal or vertical.
