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Collisions in Two Dimensions

Collisions in Two Dimensions - PHY 122 TH 9:50-11:40...

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April 16, 2009 PHY 122 TH 9:50-11:40 Collisions in Two Dimensions Hunter Garner Abstract: Introduction: This lab deals with the analysis of two separate collisions of pucks on a frictionless air table. One collision will be elastic causing the pucks to bounce off each other and the second is inelastic so the pucks will stay together after collision. This is done with the use of Velcro. The work energy theorem is used throughout this experiment which states: + = + K1i K2i K1f K2f or , + , = , + , 12m1v1 i2 12m2v2 i2 12m1v1 f2 12m2v2 f2 Eq. 1 Because the mass is constant in this experiment the equation can be divided by m resulting in:
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, + , = , + , 12v1 i2 12v2 i2 12v1 f2 12v2 f2 Eq. 2 It is through Eq. 2 that the conservation of energy will be tested and analyzed for an elastic collision. For an inelastic collision the equation is: + = v1i v2i vf Eq. 3 Methods: In this experiment pucks and an air table were provided to use for the collisions. In each experiment one puck began in motion and the other was at rest in the center of the air table. The collision of the two pucks was videotaped so that a detailed frame by frame analysis could be done.
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