Unit 6: Momentum & Impulse

1. Unit 6: Momentum & Impulse

2. https://www.youtube.com/watch?v=fUot7XSX8uA https://www.nasa.gov/feature/nasa-to-return-humans-to-the-moon Academic – Monday 2/25 Physics Fun Fact Review HW Collision Lab Collisions Formative #2 (Due next class) Collision Recap Quiz & Jeopardy next class! Unit 6 Test: 2/29

3. https://www.youtube.com/watch?v=fUot7XSX8uA Conceptual – Friday 2/22 Physics Fun Fact Review HW HW recap Summative Discuss Egg Drop Lab Intro Collisions Brief Collision Summative next class -Collision Types & Definitions Unit 6 Test: 2/28

4. Conceptual – Friday 2/15 Turn in Formative Lab Lab/Hw Recap Summative • Next Class!! Unit 6 Test: week of 2/25

5. Conceptual – Wednesday 2/13 Unit 5 Test recap Physics Fun Fact Begin Unit 6: Momentum & Impulse Begin Formative (complete for HW) Lab next class Unit 6 Quiz 2/20 Unit 6 Test: week of 2/25

6. Egg Drop Lab https://www.youtube.com/watch?v=nsnyl8llfH4

7. Physics Fun Fact – VantaBlack • https://www.youtube.com/watch?v=fg2x0L4YAuU

8. Impulse • Impulse – Average Force multiplied by the amount of time in which it occurs. J = F ∙ ∆t Unit: [N ∙ s] Often referred to as the Impulse of a Force

9. Examples • https://www.youtube.com/watch?v=Y2sjYOGSV7E (air bags) • https://www.youtube.com/watch?v=Ats0zSkWtqU • (jump bag) • https://www.youtube.com/watch?v=MpelERSN-5Q (Aric Kansas) • https://www.youtube.com/watch?v=rD8Cr1bU3Qc • https://www.youtube.com/watch?v=7CJAr2idCfw (Kyle Busch Daytona) • https://www.youtube.com/watch?v=xZfRHWXEI6w • https://www.youtube.com/watch?v=9el4ylqZ098 • https://www.youtube.com/watch?v=z_LqZHwoELc (safer Barrier) • https://www.youtube.com/watch?v=4--JOxmvSvk (Kyle Larson) • https://www.youtube.com/watch?v=OMJbYagTwCw (Tires) • https://www.youtube.com/watch?v=hGEZunyAA88 (Tires) • https://www.youtube.com/watch?v=vhu-ZhN1i-0 (Hamlin Tires) • https://www.youtube.com/watch?v=G-vlF9_sY5k (Engineer)

10. Momentum • Linear Momentum – The product of an object’s mass and velocity p = mv Unit: [kg ∙ m/s]

11. Impulse – Momentum Theorem • Impulse is equal to the change in momentum! J = F ∙ ∆t = ∆p = m

12. Motorcycle Helmets

13. Conservation of Momentum Momentum Initial = Momentum Final po = pf m1v1o + m2v2o = m1v1f + m2v2f

14. Collisions

15. Types of Collisions • Elastic: Objects separate after collision. KE is conserved (∆KE = 0J) • Collision between atoms, Space collision, billiard balls? • Think about no loss in velocity • No heat or sound • Inelastic: Objects separate after collision. KE is NOT conserved (∆KE ≠ 0J) • Bouncing Ball, Car Accident, Boxer’s Punch, etc. • A change in velocity can be observed • Heat and Sound are present • Completely Inelastic: An Inelastic Collision in which the object remain together after they collide. • Car Accident, Train cars connecting Momentum is conserved in all types of collisions

16. Collisions https://www.huffingtonpost.com/entry/the-worst-collision-of-orbiting-satellites-and-space_us_59406ffee4b04c03fa26166e

17. Collision Equations Elastic & Inelastic: m1v01 + m2v02 = m1vf1 + m2vf2 Completely Inelastic: m1v01 + m2v02 = (m1+ m2) vf