1. “Impulse and Momentum”
The Everyday Life of Impulse
Introduction to Impulse

2. Demonstrations Balloon Throw Drunk Driver Egg Drop Dive vs. Belly Flop
What is Impulse? How do these demos all show the same concepts?
Balloon Throw
Egg Drop
Bungee Jump
Jump off the Table
Egg Throw
Taking a Punch
Drunk Driver
Dive vs. Belly Flop
Airbags
Seatbelts
Padded Dashboards
Crumple Zones
They all show that
the MORE TIME it takes to stop an object
the LESS FORCE applied is needed to stop the object!
That’s the concept of Impulse!

3. Which hurts more? When you Belly Flop? Or When you Dive?
View Videos on Bucci’s page on the HopeHsBlueWave.org website!
“Victor’s Belly Flop” “Victor’s Dive”
“Victor’s Comments”

4. Impulse Δp = pf - pi Δp = mvf - mvi Δp = FΔ t
Definition
Equation
Definition
Equation
Impulse is the product of the force applied to an object and the amount of time applied
Impulse is the amount of change in an objects momentum.
Δp = pf - pi
Δp = mvf - mvi
Δp = FΔ t
For a given change in momentum (Δp): The more time applied to stop an object, the less force needed to stop it.

5. For a given change in momentum…
The more time the object has to stop, the less force needed to stop it.
The less time the object has to stop, the more force needed to stop it.

6. Cushion “Sinks in” “Stretches out” “bends” or “breaks” Crumple Zone
More time to change the momentum of an object means less force applied to the object.
Types of Protection
When the object hits …
Examples
Pillow,
Fun noodle,
air bag
Cushion
“Sinks in”
“Stretches out”
Bungee cord
Elastics
Seatbelt
Suspension
Crumple Zone
“bends” or “breaks”
Jump off table
Crumple zone
Bed of nails

7. Which hurts more? When you Belly Flop? Or When you Dive?
When you belly flop the water stops you in less time, which means it must apply more force.
When you dive, the water takes more time to stop you as you sink in and move through the water.
More time to stop, less force to stop you.

8. Airbags vs. Steering Wheel

9. The “hand chop” Brick breaking vs. Brick not breaking

10. Kicking a Football vs. Kicking a Rock

11. Bed of Nails Concrete breaking vs
Bed of Nails Concrete breaking vs. Concrete not breaking (or no concrete)

12. Football Pads and Helmets vs. No Pads and no Helmets

13. Tennis Racket vs. Paddle

14. Crumple Zones vs. Rigid Car

15. Taking a Punch Being Relaxed vs. Being Tense

16. Brick Wall vs. Pillow

17. Taking a Punch Moving with the Hit vs. Not Moving with the Hit
Taking a Punch Moving with the Hit vs. Not Moving with the Hit. (Gloves vs. No Gloves)

18. The Karate Chop Wood Breaking vs. Wood Not Breaking

19. Bungee Jumping Bungee Cord (Elastic) vs. Regular Rope

20. #1
Answer: The air bag is safer because it acts like a __________. Explain: According to the Impulse-Momentum Theorem ___________________________________________. Support: A cushion allows you to ___________, so it slows you down over more __________ before stopping you, so less ____________ is needed to stop you.

21. #1 cushion sink in time force
Answer: The air bag is safer because it acts like a __________. Explain: According to the Impulse-Momentum Theorem ___________________________________________. Support: A cushion allows you to ___________, so it slows you down over more __________ before stopping you, so less ____________ is needed to stop you.
cushion
For a given change in momentum, the more time applied to stop an object, the less force needed to stop it.
sink in
time
force

22. #2 Answer: It is safe to bungee jump because the
bungee acts like a ___________.
Explain:
According to the Impulse-Momentum
Theorem _________________________
______________________________________.
Support:
A suspension system _________, slowing you down and stopping you over more ______,
so less _______is needed to stop you!

23. #2 Answer: It is safe to bungee jump because the
bungee acts like a ___________.
Explain:
According to the Impulse-Momentum
Theorem _________________________
______________________________________.
Support:
A suspension system _________, slowing you down and stopping you over more ______,
so less _______is needed to stop you!
suspension
For a given change in momentum,
the more time applied to stop an object, the less force needed to stop it.
stretches out
time
force