1. Bellringer: 9/12/2016 Write your STOTD in your notebook.
You will need the following items:
4 Color pencils
Ruler
Calculator

2. Map your Classes! Directions:
You will have 10 minutes to do the following:
On your map:
Label your 1st ,2nd, 3rd, and 4th period classes using a different color for each class.
Using a ruler, measure the distance of the route your take from each class in centimeters

3. Motion, Forces, Work, and Power
Chapters 11 and 12

4. Meter/Second2 (m/s2 or m/s/s)
Concept
Symbol
Units
Distance d
Meter (m)
Time t
Second (s)
Speed v
Meter/Second (m/s)
Velocity
Acceleration a
Meter/Second2 (m/s2 or m/s/s)
Gravity g
Force F
Newton (N)
Weight Fg
Mass m
Kilogram (kg)
Work W
Joule (J)
Power P
Watt (W)
end

5. Motion Motion A change in position Motion is Relative Example:
Depends on the “Frame of Reference”
Example:
You and a friend are riding in the car (55 mph)
When you look at your friend, is he moving?
Nope, he is sitting still
A person on the sidewalk sees both of you, moving at 55 mph
end

6. Motion Distance Total distance = 6 Total distance = 6
Length of the path between 2 points
Add up EVERY step you take
Total distance = 6
Total distance = 6
end
The SI unit is meters (m)

7. Motion Displacement Straight line length between the start and finish
The path does not matter!!
Total displacement = 6
Total displacement = 2
end

8. Motion BUT, they both have the same displacement
Finish
Start
Alan traveled more distance
end

9. Motion
Eva’s distance?
150 m
Eva’s displacement?
50 m
end

10. Back to your school map!
Calculate the total distance you travel during your school day.
Calculate the average distance you travel between classes
Which class change requires you to travel the greatest distance
How can you shorten the route during your longest transition?

11. Graphic Organizer!
Let’s compare distance and displacement!

12. Back to your school map!
Calculate the displacement between each class.
What is your total displacement?
What is your average displacement?
Compare your distance vs displacement data.
Will the displacement values be larger than distance values?

13. Motion Speed How fast an object is moving
The SI unit is meters per second: (m/s)
end

14. Motion Velocity How fast an object is moving and its direction
The SI Unit is meters per second : (m/s)
The SI unit is
Change in position
“Δ” stands for change
= Ending – Starting
Change in time
end

15. Motion
Complete #1-5 on “ Determining Speed (Velocity)

16. **Don’t forget to write the units in your final answer!
Bellringer: 9/13/16
**Don’t forget to write the units in your final answer!
What is the speed of a car that has traveled 3050 m in 400 s?
What distance was covered if a car moving at 20 m/s travels for 500 s?
STOTD
end

17. Motion 2 types of graphs to know: Distance vs. Time Velocity vs. Time
end

18. Speed/Velocity Graph Distance vs. Time x-axis = time y-axis = distance
Slope = Speed/Velocity
Flat Line = Not Moving
Straight Line = Moving at Constant Velocity
Curved Line = Accelerating
end

19. Motion What is the object’s speed from 0 to 8 s?
What is the speed between 8 and 12 s?
What is the speed between 12 and 20 s?
end

20. end

21. Practice in Packet!!! Graphing Distance vs Time pg 19
Calculating Average Speed pg 16

24. Bellringer: 9/10/15 What is the speed at t=0.5s?
What can you tell about the object from the slope of the line?
STOTD

25. Motion Acceleration How fast an object: Gains/Loses Speed
or Changes Direction
The SI Unit is meters per second squared: (m/s2)
Starting Velocity
Ending Velocity
end

26. Motion
A car accelerates from 20 m/s to 60 m/s in 10 seconds. What is the car’s acceleration?
A ball moving at 18 m/s is accelerated at a rate of 3 m/s2 for 2 seconds. What is the final velocity?
A baseball is hit by a batter and accelerates from 0 m/s to 30 m/s in seconds. What is the acceleration?
end

27. Get out your packet!
Complete #1-5 on “Acceleration Calculations” pg 17 in Packet # 6-9 are for Homework!

28. x-axis = time y-axis = speed
Motion
Velocity vs. Time
x-axis = time y-axis = speed
Slope = Acceleration
Flat Line = Moving at Constant Velocity
Line is going up = Increasing Velocity
Line is going down = Decreasing Velocity
end

29. Graphing Practice in Packet!
Graphing Speed vs Time pg 18

30. Bellringer: 9/15/2016 What is the formula for speed?
What is the formula for acceleration?
How are distance and displacement different?
STOTD
**Turn in COMPLETED airplane lab
**QUIZ on Friday
**Have HW out

31. Chapter 12
Forces and Motion

32. Chapter 12: Forces Force (F) Net Force
A push or pull that acts on an object
Causes an object to accelerate
Measured in Newtons (N): the force that causes a 1 kg mass to move at 1 m/s2
Shown with an arrow
Big Force = Big Arrow!
Can be combined
Net Force
Overall force on object, after adding all forces together
end

33. Forces Balanced Forces Forces cancel each other out Net Force = 0
No change in motion 6N 6N =
Object stays the same
end

34. Forces Unbalanced Forces Forces do NOT cancel
Object accelerates in the direction of the larger force 6N 3N 3N =
Object Accelerates
end

35. Forces Friction Force that opposes an object’s motion
Keeps it still or slows it down
Object stays the same 6N 6N
Static
Friction
Push =
Object Accelerates 2N 6N
Sliding
Friction
Push = 4N
end

36. Types of Friction Static Friction Sliding Friction Rolling Friction
A book resting on a table… it’s not going anywhere!!
Sliding Friction
A box being pushed on the floor… it’s sliding!
Rolling Friction
A ball rolling across the floor… it’s rolling!
Fluid Friction
A boat moving through a river (Fluid is the river)
An object in free-fall (fluid is the air)

37. Forces Earth’s acceleration due to gravity is 9.8 m/s/s Gravity
Force that pulls any 2 objects together
Earth’s acceleration due to gravity is 9.8 m/s/s
end

38. Forces Projectile Motion Falling object that is moving forward
Objects move in a curved path
end

39. Chapter 11 and 12 vocab!!
Complete Vocab words found on the front of your packet on a separate paper OR on the pack page of packet:
#1-10
#21-25

40. Motion and Forces Isaac Newton Created the “Three Laws of Motion”
They have held up for more than 300 years
end

41. 2. STOTD **QUIZ TODAY Bellringer: 9/16/2016
Make a KWL chart about Motion. K stands for what you know. W stands for what you want to know. The L stands for what you have learned
K W L
2. STOTD **QUIZ TODAY

42. Bellringer: 9/19/2016
Dan drove a car 5000 meters in 800 seconds. What was Dan’s average speed?
A car traveling at 50 m/s slows down at a constant rate for 47 seconds until it stops. What is the acceleration?
STOTD
**TEST ON THURSDAY 9/22/2016

43. Motion and Forces Newton’s 1st Law of Motion Inertia
An object at rest will stay at rest, unless acted upon
An object in motion will stay in motion, unless acted upon
Also called the “Law of Inertia”
Inertia
Objects do NOT want to change their motion
end

44. Motion and Forces Newton’s 2nd Law of Motion
An object will accelerate when a force is applied
Units: Force=Newtons, a=m/s/s, m=kg
end

45. Motion and Forces
A 15.0 kg mass is pulled along by a force of 100 N. What the object’s acceleration?
A 4.5 kg mass is accelerated at 40 m/s2 what is the force that was applied?
If the same force was applied to a 18 kg object, what would be its acceleration?
A car is accelerated at 30 m/s2 by a force of N. What is the mass of the car?
end

46. Motion and Forces Weight g = 9.8 m/s/s
The force of gravity on an object
Part of Newton’s 2nd Law!!!
Units: Newtons
g = 9.8 m/s/s
end

47. Motion and Forces
a) A man has a mass of 88 kg. What is his weight on Earth?
b) If he weighs 141 N on the moon, what is the acceleration due to the moon’s gravity?
What is an object’s mass, if it weighs 534 N on Earth?
end

48. Motion and Forces Newton’s 3rd Law of Motion
For every action there is an equal and opposite reaction
These forces DO NOT cancel each other out
ForceA on B = —ForceB on A
The ball pushes back
with -12 N
He is pushing the ball
with 12 N B A
end

49. Bellringer: 9/20/2016
A car is accelerated at 30 m/s2 by a force of N. What is the mass of the car?
What is an object’s mass, if it weighs 534 N on Earth?
STOTD
**TEST on Thursday
**Packet Due Thursday!!
**Reminder to Mrs. Shaw:Wednesday Schedule**

50. Chapter 14
Work and Power

51. Work Work The result of a Force moving an Object
NO Movement = NO Work!!!
Movement and Force must be in the same direction
Carrying an Object = NO WORK!!!
units: Joule (J)
end

52. Work
A force of 825 N is needed to push a car. Two students push the car 35 m. How much work is done?
A hot-air balloon weighs a total of 8000 N. If the balloon rises to a height of 1000 m how much work was done?
A man lifts a 15 N box 1.2 m into the air. How much work did he do?
A 10 kg box is pushed 13 m across the floor at an acceleration of 3 m/s2. How much work was done to move the box?
end

53. Work Work is never 100% efficient
You put MORE energy in, than you get out
Because of FRICTION!!!
Like a car engine
Efficiency: the amount of work input that becomes work output
Work you get out
end
Work you put in

54. Power Power The Rate of doing Work Horsepower (hp) 1 hp = 746 watts
Units: Watt (W)
end

55. Power
A woman does 3400 J of work over a period of 50 s. How much power did she use?
A rocket is shot upward with a force of 2 N. It reached an altitude of 1200m in 30 s. How much power was in the rocket?
end