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# A Report About Practical Investigation of Theoretical Velocity of a Ball Bearing Gun

Grade 12 Physics Daniel Gockeritz PRACTICAL INVESTIGATION MOMENTUM AND COLLISIONS This report will investigate the theoretical velocity of a ball bearing gun The methods and techniques used to derive the results will be shown along with the possible systematic and random errors caused by experimental limitations Discussion Since the track is virtually frictionless and air resistance is neglected the system is isolated the net resultant force of the external forces equals zero The total linear momentum of the system before the collision is equal to the total momentum after the collision Therefore the total change in momentum of this two-particle system is zero Equation that represents the conservation of momentum The total linear momentum of an isolated system is constant All significant experimental errors have been incorporated into the final velocity result Aim To investigate and determine the muzzle velocity of a ball bearing gun by utilizing the law of conservation of momentum Determine out the theoretical velocity using various mathematical methods and techniques Hypothesis This two-particle system is virtually isolated thus the total change in momentum is zero Therefore when the two bodies collide they will exert forces on each other equal in magnitude but opposite in direction Resulting in one combined body that is equal to the sum of the momentum of the two particles before the collision Materials One 1 Ball bearing Weight - 659g 01 Approx Size - 2cm in diameter This will be the projectile that is fired from the missile launcher One 1 Cart Weight - 6783g 01 This will be the object on which the projectile is fired onto One 1 standard Stopwatch Can measure up to 100th of a second Used to time the journey of Cart ball bearing One 1 Track Measuring device length

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