Lab 6 PHYS 2108.docx - Halley(Vu Phan PHYS 2108 Section 23...

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Halley (Vu) Phan PHYS 2108, Section 23 13 October 2020 Lab 6: Conservation of Linear Momentum Introduction: Lab 6 investigates linear momentum – the quality of “motion.” Linear momentum insists of two quantities including mass and velocity. Purpose: As the last few chapters familiarized the Law of Conservation of energy, this experiment analyzed the Law of Conservation of Momentum and conserved energy in the absence of external force. Procedure: Preparation 1. Connect two photogates into “DIG/SONIC 1” and “DIG/SONIC 2” ports on the LabPro interface. 2. Launch LoggerPro and click File/Open menu/Probes and Sensors then open Collision Timer document. 3. To the width of the flags, adjust two boxes “Photogate Distance 1” and “Photogate Distance 2.” 4. Level the track by using the digital inclinometer to check the track in the center and at two ends. 5. Place two photogates near the center of the track with 20 cm between them. Elastic Collision 6. Adjust the carts on the track so “projectile” (m1) is before Photogate 1 and “target” (m2) is between the two photogates. Both carts should have their magnetic sides facing each other. Plug a flag into each cart on the side facing the opposite cart. 7. Choose “Collect” in LoggerPro and allow the system to collect data. Give Cart 1 a slight push towards Photogate 1. The speed of any cart that passed through the photogates will be measured. Record speeds of cart 1 and 2 (initial velocity and final velocity) into Data Table 1. 8. Repeat the experiment twice: first with the steel weight added to the target cart (m1<m2) and second with the steel weight added to the projectile cart (m1>m2). Record the velocities with signs.*