1. Do Now:
Roll the marble to your elbow buddy. What are 2 things you can change about the motion of a rolling marble? Record your ideas in your new packet p 0.

2. Motion

3. SWBAT: explain when an object is in motion and how it is in motion relative to a reference point
Vocabulary:
Motion: an object is in motion when its distance from another object is changing

4. Reference point
Sometimes it is not so easy to tell if something is moving – we are always moving

5. Relative Motion Am I moving? Compared to the windshield?
Compared to the tree?
Compared to the windshield?

6. Reference point
reference point: a reference point is a place or object used for comparison to determine if something is moving
Measuring motion always depends on a reference point

7. Do Now:
Use the bin and make a textbook into a ramp. Race two objects down the ramp. Which object rolls faster? How can you tell?

8. Speed Speed = distance in one unit of time Speed = distance / time
Speed does not have to be FAST!

9. Do Now How do you know an object is in motion?
2. Which is faster, a runner who moves 100 meters in 10 seconds, or a runner who moves 100 meters in 20 seconds? How do you know?

10. Do NOW: Using what you learned yesterday write 2 sentences about this graph.
Speed
Distance in m
Time in sec

11. Velocity
velocity = the speed and the direction of an object’s movement

12. Velocity We use meters per second (m/s) to measure speed and velocity
mm: 1,000mm = 1 m _
Cm: 100 cm = 1m ______
Km: 1000 m = 1 km ___________________________________etc

13. DO NOW
Use the words speed, distance, velocity and time. Tell me about the relationship of speed to distance if the time stays the same.
As distance traveled increases, speed ____________.
As speed increases, distance traveled ____________.

14. Velocity
velocity = the speed and the direction of an object’s movement

15. Acceleration
SWBAT describe what happens to the motion of an object as it accelerates,
SWBAT define and identify acceleration

16. Acceleration
Acceleration: rate of velocity change in either speed or direction.
Acceleration can be increasing speed, decreasing speed or change of direction.
Acceleration= (final v – initial v) / time

17. Acceleration – change in speed or direction

18. Acceleration? Yes or NO?

19. Acceleration? Yes or NO?

21. Brain pop

22. Poem
Use the words speed, velocity and acceleration in a poem. Make sure it shows you know the meaning of each term.
Other words to use, motion, rate, change

23. Do Now: Look at an object on your desk that is not in motion.
Can you change its motion? Record how you did it in your notebook (p 3).
Once it is in motion, can you change its motion? How? Record your observations.

24. Forces
Force: a push or a pull
Includes STRENGTH and DIRECTION

25. Net Forces
Net force: overall force on an object after all forces are added together,
If Net force is not zero it is unbalanced force
An unbalanced force acting on an object will change an object’s motion

26. Balanced Forces
BALANCED FORCES: equal forces acting in opposite directions
A balanced force will not change an object’s direction

27. Tug-O-War
Draw a diagram of what happened in our game. Be sure to label the forces for each team with arrows.
Was the force balanced or unbalanced?
Was there a net force? Was there motion? Which direction?
How could we make it a balanced force?
Thinking question 1: what other forces are acting on us in this game?
Thinking question 2: what factors make force bigger?

28. Do Now:
Newton came up with 3 laws that ruled all motion. What laws does all motion follow?
Can you think of one?

29. SWBAT: State Newton’s first law of motion, and define inertia
Inertia: the tendency of an object to resist change in motion
 Newton’s first law of motion states that an object in motion will remain in motion and an object at rest will remain at rest unless acted upon by an unbalanced force

30. Do NOW:
Do Question on P 22 packet
Mrs. Levin video

31. Do now
Take out and finish your ego with graph.

32. FORCE Force depends on both mass and acceleration
Force is measured in Newtons
Force = Mass x Acceleration
F= M x A

33. Newton’s Second Law of Motion
Force depends on mass and acceleration
Force = Mass x Acceleration
F= M x A
Force is measured in Newtons (N)

34. DO NOW When you go sledding, what force makes you slide down the hill?
What force stops you?
Would you go as far if there wasn’t any snow on the hill?
Why?

35. Friction and Gravity
Friction and gravity are two forces that affect nearly all motion
What determines the strength of the force of friction?

36. Do Now:
Place the wooden block on top of the board on one of the strips of material.
While you gently hold the block in place, have a partner pull the board out from under the block so the block slides along the strip, not across – don’t rip the strips.
Does the material make a difference in how hard your partner needs to pull?
Switch jobs with your partners.

37. Friction Force in N (p. 27) Board Sandpaper Rubber Cork
Wooden block with 1 weight
Block with 2 weights
Tilt board.
Hook metal weight on top of block so weight is pressing down on the wood.Slide wooden block up board. Measure and record force in Newtons(N).
Hook or balance another weight so you have 2 weights.
Slide both up board. Measure and record force in N.
What 2 factors affect friction?

38. What determines the strength of the force of friction?
The type of the two surfaces
The force which they are pressed together (how hard they rub)
Wheels, wax and oil reduce friction
Heat is produced as a result of friction – some mechanical energy turns into thermal energy

39. Gravity
Line up a penny and quarter on top of a ruler at the side of your desk. Have one observer watch the floor. Another observer watches the ruler. Tip the ruler so that both the penny and quarter fall at the same time. Which hits first? (You may have to try it several times.)

40. Gravity All objects put a gravitational force on other objects.
The more mass the object has the more gravitational force. (That’s why we feel the earth’s and moon gravity but you can’t feel the gravity of your pencil.)
Mass does not affect the acceleration of gravity.
Air resistance does affect rate of acceleration.

41. Exit

42. Do now:
Line up 5 marbles in the pencil groove on top of your desk. Roll another marble along the groove, hitting the 5 marbles on end. Observe.
Do it again but now roll 2 marbles together into the 5. Observe what happens.
How can you use Newton’s laws to explain your observation?

43. Newton’s 3rd law
For every action, there is an equal and opposite reaction
If an object
exerts a force
on a 2nd object
the 2nd object exerts
and equal and
opposite force
on the first object

44. Do Now: Explain the Cartoon

45. Newton’s 3rd Law of Motion
For every action there is an EQUAL and OPPOSITE reaction

46. Hammer

47. The 2 people are pushing each other on ice. (so no outside force)
The 2 people are pushing each other on ice. (so no outside force). The grandma has twice the mass (inertia) as the little girl. Are they going to feel the same force? according to what law ? Are they going to move as fast ?  Which one is going to move faster ?

48. Use Newton’s 3rd law to describe why the girl ended up in the water

49. How does this show Newton’s 3rd law

50. 1 Law 1 no acceleration
2 Law 3 skaters go back w acceleration
3 Law 2 golf ball accelerates
4 Law 3 cars slow – negative acceleration
5 Law 2 car accelerates down ramp
6 Law 3 rocket accelerates into space
7 Law 2 no acceleration
8 Law 3 bullet accelerates forward, guy accelerates backward
9 Law 2 small rock only accelerates
10 Law 2 both balls accelerate
11 Law 3 ball accelerates left, kid accelerates right