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Unformatted text preview: LAB 126: CONSERVATION OF MOMENTUM AND IMPULSE THEORM Mariam Selevany, Mohammed Ahmed, Abdul Wali, Andre Amparo, Alfred Continanza Chiranjivi Lamsal Physics 111A 11-04-10 Introduction In this lab we will measure the glider velocities before and after collisions. In addition we will directly measure the impulse of a collusion between the glider and the force probe and compare it with the change in the momentum of the glider. Linear Momentum is p=MV, where p=linear momentum, m=mass, and v=velocity. Newton’s law for linear momentum says that linear momentum p may change only if there is an external force acting on a system. Collisions between the elements of a system don’t change the total linear momentum of the system. The definition of impulse J is J=Ft, where F is a external force acting during time t, does change the linear momentum of the system by J=Delta (P). And finally, the definition of elastic collision is KE=Constant. Collision is fully elastic if Kinetic Energy of the system doesn’t change amid collision. The definition of perfectly inelastic collision is that collision is fully inelastic between any two elements if the “stick” (move with same velocity) after the collision. Procedure Part 1Elastic Collisions-Weigh the gliders without any added mass on them, but be sure to include the yokes.-Check to ensure that the air track is leveled before each experiment by observing for any motion of the gliders.-Set up the two gliders with the rubber band yokes to be used to create the elastic collision.-Prepare the gliders with glider m2 between the photo gates and m1 outside photo gate 1. Add an additional 100 g of weight to glider m2 and make sure that collision (Contact) between the 2 gliders takes place only while they are both between the gates.-Best results are obtained by measuring the velocities immediately before and after the collision. Do not keep the photo gates too far from each other. -Connect Photo gate 1 to port DG1 and photo gate 2 to port DG2 of ULI. Confirm that the ULI is on. Open LoggerPro file Lab 126.-Press the collect button then push the glider M1 through the gate 1. Press the Stop button when both gliders are outside the gates to finish the experiment.-Add an additional 100 g mass to glider 2 and repeat the experiment. Observe the collision when gliders 1 and 2 have identical masses. For each of the 3 collisions, compute the momentum and kinetic energy before and after the collisions. Verify that momentum and Kinetic energy are conserved....
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This note was uploaded on 11/23/2010 for the course CHEM 305893 taught by Professor Oprychal during the Spring '10 term at NJIT.
- Spring '10