Experiment:
A student hangs from a bar and waits for the teacher to launch a ball that is aimed directly at him. What should the student do to not get hit by the ball?

Observations:

• Although this move show only one instance, provided the ball is aimed directly at the student initially, the student and the ball will always meet independent of the initial speed of the ball. Run the Student Target IP Simulation to vary the parameters.
• If the ball is launched with a high velocity then the two will meet near the student's initial position. They will not meet if the ball is launched with too low a velocity so that the ball hits the ground before it can reach the student.
• The independence of motion of the horizontal and vertical motion implies that the horizontal launch velocity of the ball can have no effect on the ball's or student's vertical motion. They both fall downwards, away from the "aim-line" at 9.80 m/s².
• This example is a tilted example of the problem where one object is launched horizontally while dropping another at the same moment from the same height, and asking which one will hit the ground first.