Lab 9 - Linear Momentum.docx

PHYS 140 Linear Momentum Lab 9 Name: _____________________________________ Objective The objective of this lab is to verify conservation of linear momentum in elastic and inelastic collisions, and study the kinetic energy under each of these two cases. Background Momentum: 𝑝 = 𝑚𝑣 Kinetic Energy: 𝐾 = 1 2 𝑚𝑣 2 Conservation of Liner Momentum (for Elastic and Inelastic Collisions): 𝑚 1 𝑣 1,𝑖 + 𝑚 2 𝑣 2,𝑖 = 𝑚 1 𝑣 1,𝑓 + 𝑚 2 𝑣 2,𝑓 Conservation of Kinetic Energy (for Elastic Collisions): 1 2 𝑚 1 𝑣 1,𝑖 2 + 1 2 𝑚 2 𝑣 2,𝑖 2 = 1 2 𝑚 1 𝑣 1,𝑓 2 + 1 2 𝑚 2 𝑣 2,𝑓 2 Procedure Go to: https://phet.colorado.edu/sims/html/collision-lab/latest/collision-lab_en.html Select “ Explore 2D ” . Select “ More Data ” . Run the simulation for the 100% Elastic Collision and 0% Elastic (Inelastic) Collision. Collect the data and complete the tables in the Data section.

PHYS 140 Linear Momentum Lab 9 Data: Part 1: 100 % Elastic (Fully Elastic) Collision Before Collision Ball Mass (kg) Initial Velocity in x-direction (m/s) Initial Velocity in y-direction (m/s) Initial Momentum in x-direction (kg m/s) Initial Momentum in y-direction (kg m/s) Initial Kinetic Energy (J) 1 0.5 2 1.0 After Collision Ball Mass (kg) Final Velocity in x-direction (m/s) Final Velocity in y-direction (m/s) Final Momentum in x-direction (kg m/s) Final Momentum in y-direction (kg m/s) Final Kinetic Energy (J) 1 0.5 2 1.0 Part 2: 0% Elastic (Inelastic) Collision Before Collision Ball Mass (kg) Initial Velocity in x-direction (m/s) Initial Velocity in y-direction (m/s) Initial Momentum in x-direction (kg m/s) Initial Momentum in y-direction (kg m/s) Initial Kinetic Energy (J) 1 0.5 2 1.0 After Collision Ball Mass (kg) Final Velocity in x-direction (m/s) Final Velocity in y-direction (m/s) Final Momentum in x-direction (kg m/s) Final Momentum in y-direction (kg m/s) Final Kinetic Energy (J) 1 0.5 2 1.0

PHYS 140 Linear Momentum Lab 9 Conclusion 1. Was the objective of the lab accomplished? Is Linear Momentum conserved during a collision? Is Kinetic Energy conserved during a collision? Explain. 2. Physically what occurs differently between an Elastic and an Inelastic collision?