Problem 4-21-Projectile - D
A football is placed on a line \(25\; m\) from the goalpost. The placement kicker kicks the ball directly toward the goalpost, giving it a velocity of \(21.0\; m/s\) at an angle of \(47.0^\circ\) above the horizontal. The horizontal bar of the goalpost is \(3.0\; m\) above the field. How far above or below the horizontal bar of the goalpost will the ball travel?
We must choose a coordinate system in which to solve the problem. Which is best?
(D) There is no such thing as a "wrong" orthogonal coordinate system, but this is the least desirable as its directions do not correspond to anything in the problem.