Move point A to change where the projectile land.[br]Slide "t" to see where the projectile would be at any point in time.[br]Slide "angle" to see how the initial angle affects the projectile's motion.

At what angle is the projectile's motion most efficient?[br][br]In what parts of the projectile's motion is vertical velocity positive? negative?[br][br]What effect does the angle have on the initial velocity needed to reach point A?