PRELAB QUESTIONS 1. Two gliders of equal mass m and equal and opposite initial velocity v collide perfectly elastically. Using both the momentum and energy conservation equations from Equation (71), what are the nal velocities and kinetic energies of each glider? 2. If two gliders of equal mass m and equal and opposite initial velocity v collide and stick together, using Equation (78), derive a formula for the total initial kinetic energy, the total nal kinetic energy, and the amount of energy converted to heat, in terms of m and v