Two Dimensional Trajectory Problems

Imagine a football being tossed far across a football field. Think of the motion of a rock being thrown high into the air from a high mountain. Try to picture a bunny hopping across a patch of grass. What similarities do you see in all of these images?

All of the objects followed a curved path that went up for some time and then turned and moved down back toward Earth. Any object following this path of motion is called a projectile.