PES 1150 Cons Momentum Report

Conservation of Momentum Name: Objective Your answer here (erase this!) Data and Calculations Part I: Magnetic Bumpers 1.) Paste an example of one of your collision graphs with the coordinate information displayed.

P E S 1 1 5 0 - G E N E R A L P H Y S I C S L A B I 2.) Fill in the table with the raw data off your graphs. (Note: fill in the mass column with the exact weight determined by the electronic balance) Red Cart Blue Cart Trial Mass (kg) Initial Velocity (m/s) Final Velocity (m/s) Mass (kg) Initial Velocity (m/s) Final Velocity (m/s) 1 m cart m cart 2 m cart + bar mass m cart 3 m cart m cart + bar mass Hint: Maintain all positive and negative signs. 3.) Use data table above to determine the final and initial momentums and Kinetic energies of both carts: Red Cart Trial Mass (kg) Initial Velocity (m/s) Final Velocity (m/s) Initial Momentum (kg m/s) Final Momentum (kg m/s) Initial Kinetic Energy (J) Final Kinetic Energy (J) 1 2 3 Hint: Maintain all positive and negative signs. Blue Cart Trial Mass (kg) Initial Velocity (m/s) Final Velocity (m/s) Initial Momentum (kg m/s) Final Momentum (kg m/s) Initial Kinetic Energy (J) Final Kinetic Energy (J) 1 2 3 Hint: Maintain all positive and negative signs. Show Work: 4.) Determine the final momentum and kinetic energy of the system. Conservation of Momentum - 2 Show one example of each calculation performed above.

P E S 1 1 5 0 - G E N E R A L P H Y S I C S L A B I Red Cart Blue Cart Trial Mass (kg) Initial Velocity (m/s) Final Velocity (m/s) Mass (kg) Initial Velocity (m/s) Final Velocity (m/s) 4 m cart m cart 5 m cart + bar mass m cart 6 m cart m cart + bar mass Hint: Maintain all positive and negative signs. 3.) Use data table above to determine the final and initial momentums and Kinetic energies of both carts: Red Cart Trial Mass (kg) Initial Velocity (m/s) Final Velocity (m/s) Initial Momentum (kg m/s) Final Momentum (kg m/s) Initial Kinetic Energy (J) Final Kinetic Energy (J) 4 5 6 Hint: Maintain all positive and negative signs. Blue Cart Trial Mass (kg) Initial Velocity (m/s) Final Velocity (m/s) Initial Momentum (kg m/s) Final Momentum (kg m/s) Initial Kinetic Energy (J) Final Kinetic Energy (J) 4 5 6 Hint: Maintain all positive and negative signs. Show Work: 4.) Determine the final momentum and kinetic energy of the system. Trial Initial Momentum Final Momentum Ratio ( ρ f / ρ o ) Initial Kinetic Energy of the Final Kinetic Energy of the Ratio ( K f / K o ) Conservation of Momentum - 4 Show one example of each calculation performed above.

P E S 1 1 5 0 - G E N E R A L P H Y S I C S L A B I of the System ρ o (kg m/s) of the System ρ f (kg m/s) System K o (J) System K f (J) 4 5 6 Show Work: Results and Questions Part I: Magnetic Bumpers 1.) If the total momentum for a system is the same before and after the collision, we say that momentum is conserved . a. If momentum is conserved, what should the ratio of the total momentum after the collision divided by the total momentum before the collision be equal too? Explain. Your answer here (erase this!) b. Inspect the momentum ratios. Even if momentum is conserved for a given collision, the measured values may not be exactly the same before and after due to measurement uncertainty. Is momentum conserved in your magnetic collisions? Explain. Conservation of Momentum - 5 Show one example of each calculation performed above.

P E S 1 1 5 0 - G E N E R A L P H Y S I C S L A B I Your answer here (erase this!) c. Did the change in the mass of the carts have a significant impact on your final ratio? Why or why not? Your answer here (erase this!) 3.) From everything you know about the momentum and kinetic energy changes in the magnetic bumper experiment, how would you classify this collision: explosive, elastic, inelastic, or perfectly inelastic. Justify. Your answer here (erase this!) Part II: Velcro Bumpers 1.) If the total momentum for a system is the same before and after the collision, we say that momentum is conserved . a. Inspect the momentum ratios. Is momentum conserved in your Velcro collisions? Explain. Your answer here (erase this!) b. Did the change in the mass of the carts have a significant impact on your final ratio? How? Conservation of Momentum - 7

P E S 1 1 5 0 - G E N E R A L P H Y S I C S L A B I Your answer here (erase this!) c. What changed to compensate for a change in the carts masses? Explain. Your answer here (erase this!) 2.) If the total kinetic energy for a system is the same before and after the collision, we say that kinetic energy is conserved . a. Inspect the kinetic energy ratios. Is kinetic energy conserved in your Velcro collisions? Explain. Your answer here (erase this!) b. Did the change in the mass of the carts have a significant impact on your final ratio? Why or why not? Your answer here (erase this!) 3.) From everything you know about the momentum and kinetic energy changes in the Velcro bumper experiment, how would you classify this collision: explosive, elastic, inelastic, or perfectly inelastic. Justify. Conservation of Momentum - 8

P E S 1 1 5 0 - G E N E R A L P H Y S I C S L A B I 4.) How does your data support that kinetic energy is conserved in elastic collisions? Your answer here (erase this!) Conclusion Your answer here (erase this!) Conservation of Momentum - 10