This is part of practice lesson plan that I'm doing for my teacher certification program.

1. Momentum
and Collision
Mr. Sullivan
Pre-AP Physics
Grades 10-12
Thursday, April 14, 2011

2. Today’s Objectives
Thursday, April 14, 2011

3. Today’s Objectives
Understand the ideas of (a) momentum, (b) conservation of
momentum, and conversation of momentum in (c) elastic and
inelastic collisions.
Thursday, April 14, 2011

4. Today’s Objectives
Understand the ideas of (a) momentum, (b) conservation of
momentum, and conversation of momentum in (c) elastic and
inelastic collisions.
Interpret questions related to real life examples of (a) momentum,
(b) conser vation of momentum, (c) inelastic collisions, and elastic
collisions.
Thursday, April 14, 2011

5. Today’s Objectives
Understand the ideas of (a) momentum, (b) conservation of
momentum, and conversation of momentum in (c) elastic and
inelastic collisions.
Interpret questions related to real life examples of (a) momentum,
(b) conser vation of momentum, (c) inelastic collisions, and elastic
collisions.
Compose a logical procedure to solve for required information from
prior questions.
Thursday, April 14, 2011

6. Today’s Objectives
Understand the ideas of (a) momentum, (b) conservation of
momentum, and conversation of momentum in (c) elastic and
inelastic collisions.
Interpret questions related to real life examples of (a) momentum,
(b) conser vation of momentum, (c) inelastic collisions, and elastic
collisions.
Compose a logical procedure to solve for required information from
prior questions.
Design and Reconstruct personal examples of momentum,
conservation of momentum, inelastic collisions, and elastic
collisions.
Thursday, April 14, 2011

7. What is Momentum?
Thursday, April 14, 2011

8. What is Momentum?
Momentum is the vector quantity that represents a
mass with a velocity at specific moment in time.
Thursday, April 14, 2011

9. What is Momentum?
Momentum is the vector quantity that represents a
mass with a velocity at specific moment in time.
Or
Thursday, April 14, 2011

10. What is Momentum?
Momentum is the vector quantity that represents a
mass with a velocity at specific moment in time.
Or
Momentum is mass in motion.
Thursday, April 14, 2011

11. How do we represent
momentum?
We represent momentum with the equation...
p=mxv
Where,
p = momentum (kg x m/s)
m = mass (kg)
and v = velocity (m/s)
Thursday, April 14, 2011

12. What are some real
world examples of
momentum?
Thursday, April 14, 2011

13. Example problem
What is the momentum of a 747 jet (400,000 kg)
that is traveling south from Dallas to Houston at a
velocity of 900 km/h (250 m/s)?
Thursday, April 14, 2011

14. Example problem
What is the momentum of a 747 jet (400,000 kg)
that is traveling south from Dallas to Houston at a
velocity of 900 km/h (250 m/s)?
First Define the variables and draw a diagram.
Thursday, April 14, 2011

15. Example problem
What is the momentum of a 747 jet (400,000 kg)
that is traveling south from Dallas to Houston at a
velocity of 900 km/h (250 m/s)?
First Define the variables and draw a diagram.
The Known or what values are given to us.
Thursday, April 14, 2011

16. Example problem
What is the momentum of a 747 jet (400,000 kg)
that is traveling south from Dallas to Houston at a
velocity of 900 km/h (250 m/s)?
First Define the variables and draw a diagram.
The Known or what values are given to us.
The Unknown or what are we solving for.
Thursday, April 14, 2011

17. Example problem
What is the momentum of a 747 jet (400,000 kg)
that is traveling south from Dallas to Houston at a
velocity of 900 km/h (250 m/s)?
First Define the variables and draw a diagram.
The Known or what values are given to us.
The Unknown or what are we solving for.
Second Define the equation we need to use.
Thursday, April 14, 2011

18. Example problem
What is the momentum of a 747 jet (400,000 kg)
that is traveling south from Dallas to Houston at a
velocity of 900 km/h (250 m/s)?
First Define the variables and draw a diagram.
The Known or what values are given to us.
The Unknown or what are we solving for.
Second Define the equation we need to use.
Third Plug in the known values and solve for the unknown.
Thursday, April 14, 2011

19. Example problem
What is the momentum of a 747 jet (400,000 kg)
that is traveling south from Dallas to Houston at a
velocity of 900 km/h (250 m/s)?
First Define the variables and draw a diagram.
The Known or what values are given to us.
The Unknown or what are we solving for.
Second Define the equation we need to use.
Third Plug in the known values and solve for the unknown.
Last does your answer make sense?
Thursday, April 14, 2011

20. Answer
The 747 jet has a momentum of
100,000,000 kg x m/s
in the southern direction.
Thursday, April 14, 2011

21. What is conservation
of momentum?
Thursday, April 14, 2011

22. What is conservation
of momentum?
The conservation of momentum is the
fundamental law that objects acting in a closed
system will maintain momentum through
collisions with other objects in the system.
Thursday, April 14, 2011

23. What is conservation
of momentum?
The conservation of momentum is the
fundamental law that objects acting in a closed
system will maintain momentum through
collisions with other objects in the system.
Or
Thursday, April 14, 2011

24. What is conservation
of momentum?
The conservation of momentum is the
fundamental law that objects acting in a closed
system will maintain momentum through
collisions with other objects in the system.
Or
When t wo objects collide the starting
momentum of the objects will be the same as
the finishing momentum of the objects.
Thursday, April 14, 2011

25. How do we represent
conservation of momentum?
We represent conservation of momentum of
t wo objects with the equation...
p1i + p2i = p1f + p2f
Where,
p1i = the initial momentum of object 1
p2i = the initial momentum of object 2
p1f = the final momentum of object 1
p2f = the final momentum of object 2
The Equation can also be written as...
(m1 x v1i) +(m2 x v2i) = (m1 x v1f) + (m2 x v2f)
Thursday, April 14, 2011

26. What is the difference bet ween
elastic and inelastic collisions?
Thursday, April 14, 2011

27. What is the difference bet ween
elastic and inelastic collisions?
An elastic collision is when objects
collide and bounce apart.
Thursday, April 14, 2011

28. What is the difference bet ween
elastic and inelastic collisions?
An elastic collision is when objects
collide and bounce apart.
Such as when a tennis ball hits a racket.
Thursday, April 14, 2011

29. What is the difference bet ween
elastic and inelastic collisions?
An elastic collision is when objects
collide and bounce apart.
Such as when a tennis ball hits a racket.
An inelastic collision is when objects
collide they stick together.
Thursday, April 14, 2011

30. What is the difference bet ween
elastic and inelastic collisions?
An elastic collision is when objects
collide and bounce apart.
Such as when a tennis ball hits a racket.
An inelastic collision is when objects
collide they stick together.
Such as when someone jumps into a boat
sitting still.
Thursday, April 14, 2011

31. What are some real
world examples of
conservation of
momentum?
Thursday, April 14, 2011

32. Example Problem
Ann (65 kg) is roller skating west at 12 m/s, and hits
Joe (49 kg) who is also on skates but who was
standing still. Ann comes to complete stop after she
hits Joe. What is Joe’s velocity after the collision?
Thursday, April 14, 2011

33. Example Problem
Ann (65 kg) is roller skating west at 12 m/s, and hits
Joe (49 kg) who is also on skates but who was
standing still. Ann comes to complete stop after she
hits Joe. What is Joe’s velocity after the collision?
First Define the variables and draw a diagram.
Thursday, April 14, 2011

34. Example Problem
Ann (65 kg) is roller skating west at 12 m/s, and hits
Joe (49 kg) who is also on skates but who was
standing still. Ann comes to complete stop after she
hits Joe. What is Joe’s velocity after the collision?
First Define the variables and draw a diagram.
The Known or what values are given to us.
Thursday, April 14, 2011

35. Example Problem
Ann (65 kg) is roller skating west at 12 m/s, and hits
Joe (49 kg) who is also on skates but who was
standing still. Ann comes to complete stop after she
hits Joe. What is Joe’s velocity after the collision?
First Define the variables and draw a diagram.
The Known or what values are given to us.
The Unknown or what are we solving for.
Thursday, April 14, 2011

36. Example Problem
Ann (65 kg) is roller skating west at 12 m/s, and hits
Joe (49 kg) who is also on skates but who was
standing still. Ann comes to complete stop after she
hits Joe. What is Joe’s velocity after the collision?
First Define the variables and draw a diagram.
The Known or what values are given to us.
The Unknown or what are we solving for.
Second Define the equation we need to use.
Thursday, April 14, 2011

37. Example Problem
Ann (65 kg) is roller skating west at 12 m/s, and hits
Joe (49 kg) who is also on skates but who was
standing still. Ann comes to complete stop after she
hits Joe. What is Joe’s velocity after the collision?
First Define the variables and draw a diagram.
The Known or what values are given to us.
The Unknown or what are we solving for.
Second Define the equation we need to use.
Third Plug in the known values and solve for the unknown.
Thursday, April 14, 2011

38. Example Problem
Ann (65 kg) is roller skating west at 12 m/s, and hits
Joe (49 kg) who is also on skates but who was
standing still. Ann comes to complete stop after she
hits Joe. What is Joe’s velocity after the collision?
First Define the variables and draw a diagram.
The Known or what values are given to us.
The Unknown or what are we solving for.
Second Define the equation we need to use.
Third Plug in the known values and solve for the unknown.
Last does your answer make sense?
Thursday, April 14, 2011

39. Answer
Joe will be rolling at 15.9 m/s west.
Thursday, April 14, 2011

40. Same Question
Thursday, April 14, 2011

41. Same Question
Except now Ann grabs on too Joe and they start
rolling together. What is the resulting velocity
of the t wo roller skaters?
Thursday, April 14, 2011

42. Same Question
Except now Ann grabs on too Joe and they start
rolling together. What is the resulting velocity
of the t wo roller skaters?
Answer
Thursday, April 14, 2011

43. Same Question
Except now Ann grabs on too Joe and they start
rolling together. What is the resulting velocity
of the t wo roller skaters?
Answer
Ann and Joe are rolling at 6.8 m/s to the west.
Thursday, April 14, 2011

44. Review
Thursday, April 14, 2011

45. Review
Momentum is mass in motion
Thursday, April 14, 2011

46. Review
Momentum is mass in motion
p=mxv
Thursday, April 14, 2011

47. Review
Momentum is mass in motion
p=mxv
Conser vation of momentum means
the starting momentum equals the
ending momentum.
Thursday, April 14, 2011

48. Review
Momentum is mass in motion
p=mxv
Conser vation of momentum means
the starting momentum equals the
ending momentum.
p1i + p2i = p1f + p2f
(m1 x v1i) +(m2 x v2i) = (m1 x v1f) + (m2 x v2f)
Thursday, April 14, 2011

49. Review
Thursday, April 14, 2011

50. Review
An elastic collision is when objects move
separately even after a collision
Thursday, April 14, 2011

51. Review
An elastic collision is when objects move
separately even after a collision
An inelastic collision is when objects move
together as one mass after a collision.
Thursday, April 14, 2011

52. Furthering Your
Understanding
You Tube Videos:
http://www.youtube.com/watch?v=eQ3RfKPPO2o
http://www.youtube.com/watch?
v=UcFz1L4BFcA&feature=related
http://www.youtube.com/watch?
v=mR8kDvCmHQA&feature=
Thursday, April 14, 2011