1. Impulse and Momentum
Physics

2. Bell Ringer 1/5/17 (5 minutes)
Number all problems on the worksheet.
Given the formula for momentum
Label all the known and unknown in example problems 1-3 on the front of the ch.6 momentum and impulse worksheet given.
Pick up a calculator. If time permits solve them.

3. Objectives We will Understand the concepts of momentum & impulse
I will apply my understanding of momentum & impulse to Interpret & solve questions related to real life scenarios of momentum & impulse
TEK: 6C calculate the mechanical energy of power generated within impulse applied to, and the momentum of a physical system.

4. Intro to topic: MOMENTUM & IMPULSE Example Problems Complete worksheet
AGENDA
Intro to topic: MOMENTUM & IMPULSE
Example Problems
Complete worksheet
Egg drop project Information

5. Video Intro
examples.html#transcriptHeader Or

6. p = mv Momentum The momentum of an object is:
The product of an object’s ______ and its object’s ________.
p = mv
Momentum is a ________quantity. (It has magnitude & direction).
units - _______

7. p = mv Momentum The momentum of an object is:
The product of an object’s mass and its object’s velocity.
p = mv
Momentum is a vector quantity.
units - kg m/s

8. Momentum
In symbols:
p = mv p m v

9. Momentum Example Problem 1
1. A 2250 kg pickup truck has a velocity of 25 m/s to the east. What is the momentum of the truck?

10. Momentum Example Problem 2
2. A deer with a mass of 146 kg is travelling with a momentum of kg m/s to the south. How fast is the deer travelling?

11. Momentum Example Problem 3
3. The earth is moving with a momentum of 1.78x 1029 kgm/s If the Earth is moving in its orbit with a velocity equal to 2.98x 104 m/s forward, how massive is the earth?

12. Units
Quantity
Units
Force
time
mass
velocity
Impulse

13. Units
Quantity
Units
Force N
time s
mass kg
velocity
m/s
Impulse
N.s

14. I =Δp= Δ(m*v) Impulse & Momentum
The impulse exerted on an object equals the object’s change in ____________.
In symbols:
I = Dp
I =Δp= Δ(m*v)

15. I =Δp= Δ(m*v) Impulse & Momentum
The impulse exerted on an object equals the object’s change in momentum.
In symbols:
I = Dp
I =Δp= Δ(m*v)

16. Impulse

17. Real Life Scenarios

18. Impulse – Momentum Relationships

19. Impulse, I or Δp
In symbols:
∆p = F Δt ∆p F
Δ t

20. Impulse is a vector quantity. Common units of impulse: N s

21. Impulse Example Problem 4
A 1400 kg car moving east with a velocity of 15 m/s collides with a utility pole and is brought to rest in 0.30 s. What is the force exerted on the car during the collision?

22. Impulse Example Problem 7
A 2240 kg car travelling to the west slows down uniformly from 20 m/s to 5 m/s. How long does it take the car to decelerate if the force on the car is 8410N to the east?

23. END