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\section{Discussion}  Conservation of Momentum is correct within the error of this experiment. The accuracy of the data is limited by our ability to see and react to the motion of the balls and record the position where the ball stops. If the balls are at different heights when they collide, then some of the momentum will This problem could  be dissipated along the supports and lost alleviated by a computer vision system  to track  the measurements. If location of the balls. Other problems with this experimental setup are if  the balls are released at different times, then they will not collide at the bottom of  the time collider  and velocity the momentum  will be different from the calculated values which introduces error into the calculations. momentum.  Air resistanceis  also a source of error. will dissipate kinetic energy from the collider, ultimately resulting in the balls coming to rest.