Velocity range 0-200 m/s 200-400 m/s 400-600 m/s 600-800 m/s 800-1000 m/s 1000-1200 m/s #of balls at 500 m/s of balls at 700 m/s of ball at 900m/s 4 0 1 3 1 3 1 3 5 4 1 3 5 0 1 2 1200-1400 m/s 0 0 1 over 1400 m/s 0 0 mass of one ball initial k. e. of the system 4.34556e-26 4.35e-26 4.34556e-26 2.64e-19 8.15e-20 1.60e-19 minimum k. e. after 60 sec. k. e. % error maximum k. e. after 60 sec k. e. % error initial and max 1.99e-19 5.12776e-20 6.60526e-20 3706.67% 5863.95% 2460.91% 1.25152e-19 2.81592e-19 8.25874e-20 136.00% 2163.27% 666.67% average k. e. max and min 9.56e-20 6.69325e-20 2.40e-19