22. Two rubber band balls are travelling towards each other. The first rubber band ball (mi) has a mass of 1.0kg and the second rubber band ball (m2) has a mass of 2.0kg. The first ball is travelling at +7m/s and the second ball is travelling at -4m/s. The two rubber band balls undergo an elastic collision. (10 points) a) Draw a before and after picture and include all the given information. b) Use conservation of momentum to find the first equation of your system of equations. Simplify. c) Use conservation of kinetic energy to find the second equation of your system of equations. Simplify. d) What is the final velocity of mi? 25. Whend e) What is the final velocity of my?worDirections: Write your answers in the provided answer sheet. Show all work. Circle final answers. Use proper SI units. 21. Ryan is broom jousting with Justin on his bike. Ryan and his bike have a mass of 100kg. Justin and his bike have a mass of 120kg. Ryan and Justin's collision is perfectly inelastic. If Ryan is travelling at +5m/s before the collision and Justin is travelling with -8.5 m/s before the collision, what is their velocity after the collision? a) What is their velocity after the collision? b) What is the initial kinetic energy of the system? of the A 40 & g ball hun a tree What is the ball's c) What is the final kinetic energy of the system? Which ha d) How much kinetic energy is lost (answer with the percent)