The second is the shot where the ball is bounced off all three walls near the top, this causes the ball to lose much of its momentum towards the end, forcing the opponent to run around. Lastly, the back block shot is not the best defensive shot, but it will put someone in a bad position on the court. The formula for basic kinematics is V= Vo + at , Δx = Vot + .5at2, V2= Vo2 + 2a(X-Xo). Velocity is simple to find, the first is acceleration; which on earth is 9.8 m/s2. By finding the simple velocity just after or before the ball hits the racket, you would use the formula above for basic kinematics. Anything that is in motion is said to have kinetic energy. The formula for kinetic energy is E= I/2 m v2. Kinetic energy in racquetball can be up to 90 Jol. The ball must pass through at least two contacts losing energy otherwise