1. Chapter 3, Section 6 Conservation of Momentum

2. Date: February 6, 2012HW: 3.6 PTG #1-16, pg. 319 Due Wed/Thurs • Learning Objective: • Describe conservation of momentum in collisions • Success Criteria: • Calculate momentum in a system • Define conservation of momentum in words and equations • Do Now: • Copy LO and SC on new left side page • WDYS/WDYT pg. 310 • Agenda: • Do Now • PhET/Investigate • Physics Talk • PTG • Summary/Quiz

3. Investigate: • Collision PhET

5. Momentump=mv

6. Physics Talk 3.6 • What is the Conservation of Momentum? • The total momentum before a collision, is equal to the total momentum after the collision if no external forces act on the system.

7. What is the equation for momentum? • What is the equation for conservation of momentum? • p=mv • p=momentum [kg*(m/s)] • m=mass (kg) • v=velocity (m/s)

8. Why is this equation written like this? • You added the masses after the collision because they stuck together

9. Pool ball example • Single cue ball hits a rack of 15 balls…momentum is conserved! • Total momentum before is equal to the total momentum after the collision • The balls move in new directions with new speeds, but the momentum stays the same!

10. Why is conservation of momentum important? • Used to investigate traffic accidents • If you know masses and velocities of two objects, you can predict the velocity after the collision…you can predict the future!

11. December 8, 2010HW: Grade Report Signed • Learning Objective: • Describe conservation of momentum in collisions • Success Criteria: • Calculate momentum in a system • Define conservation of momentum in words and equations • Do Now: • 10 minutes to complete packet • Agenda: • Do Now • PhET/Investigate • Physics Talk • PTG • Summary/Quiz

12. Honors Presentations: • 3.5 Bri • 3.5 Malcolm • 3.6 Christine • 3.6 Rebekah • 3.6 Jose Ramos

13. Practice Problems PTG pg. 319 #1-16

14. Essential Questions • LO and SC Reflection • Answer essential questions pg. 318

15. Quiz!