Physics lab: Motion in two dimensions.

In physics, we are studying motion.  This lab is about motion in two dimensions.  The students had to construct a ramp, take careful measurements and make the proper calculations to determine where to place a penny on the floor.  When they roll the ball down their ramp, it had to hit the penny.  Hit, and it's an A.  Miss.... and you fail.  My students get a bit stressed out but they really enjoy this lab.