Students will create mouse trap catapults from mouse traps, craft sticks, plastic spoons and duct tape. Students will launch ping pong balls and record initial height, time and distance for 9 trials. They will then find the average air time and average distance. Next, they will substitute in their average time (t), initial height (c), and end height (h) into the equation h=-16t² + vt + c and solve for v, for each of the 9 trials & average. Once they have their initial velocity they substitu