Advanced/Notes 7.3
- 2. • How do measure an impulse? Collisions and Impulse
- 3. • Large forces occur during collisions • These forces deform objects • Deformation occurs because huge jumps in forces happen over a short amount of time Collisions
- 4. • Time of collisions is very short • We need not worry about the exact time dependence of the force • We can use average force Collisions
- 5. • Impulse
- 6. • Can have the same change in momentum • A large force acting for a short time • A small force acting for a longer time • Bend your knees when you land Impulse
- 7. • If I drop an egg… • http://www.youtube.c om/watch?v=C08JBiq 2eJ4 Why does it matter?
- 8. • Driving along, suddenly a brick wall appears in front of you and you crash. Your mass is 60 kg and you were driving 25 m/s. With no airbag, your body comes to rest in 3 x 10-4 s. An airbag can extend the time to rest by a factor of 100. Calculate the two impulses. Why airbags?
- 9. • Read Section 7.3 • Do Problems # 15 – 19, Page 188 • Bonus # 21 • Egg Drop Challenge Homework