Bouncing Ball KE and momentum?? Does anyone know how to calculate the KE and momentum of a bouncing ball? My quadratic equation is -4.113^t2+19.7t-22.72 The bounce begins at t=1.90s the bounce ends at t=2.85s The maximum height from my graph is (i think).8m. For this exp I don't need the mass as I am trying to derive the following KE/m and p/m both before and after impact. I am so confused; do I plug in the start time of the bounce into the quadratic equation? then what? i nkow PE is related to this somehow, so should I be using gh to find KE/m? can someone please help?