1. IPC

3. Newton’s 1st Law of Motion Newton’s 1st Law of Motion – Objects in motion will stay in motion and objects at rest will stay at rest…unless a force acts on them..

4. Newton’s 1st Law of Motion Newton’s 1st Law of Motion – Objects in motion will stay in motion and objects at rest will stay at rest…unless a force acts on them. The ball will stay at rest (not move) unless the dog moves it.

6. Newton’s 2nd Law of Motion Newton’s Second Law of Motion - "F = ma: the net force on an object is equal to the mass of the object multiplied by its acceleration.

7. Newton’s 2nd Law of Motion Newton’s Second Law of Motion - "F = ma: the net force on an object is equal to the mass of the object multiplied by its acceleration. You bunt – the ball doesn’t go far. You swing hard (more force), the object accelerates faster.

9. Newtons Third Law of Motion Newton’s Third Law of Motion - To every force or action, there is always an equal and opposite reaction.

10. Newtons Third Law of Motion Newton’s Third Law of Motion - To every force or action, there is always an equal and opposite reaction. The cannon has a backward kick when it is fired.." http://www.youtube.com/watch?v=b9qvt_L S5sg http://www.youtube.com/watch?v=b9qvt_L S5sg

11. BALL BUNT CANNON

12. WHOLE BRAIN Now turn to your partner and NAME the 3 pics of Newton's LAWS 1. 2. 3. Describe why the pics represent the LAWS...

13. Question What makes an object difficult to stop?

14. Momentum

17. Question A ball of mass 2 kg. is moving with a speed of 4 m/s. What is its momentum?

18. Answer A ball of mass 2 kg. is moving with a speed of 4 m/s. What is its momentum Momentum = (mass)(velocity) = (2 kg)(4 m/s) = 8 kg m/s

19. Mass More mass means more momentum (when object is moving) Twice the mass means twice the momentum (when object is moving at same rate of speed).

20. Law of Conservation of Momentum For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collisionisolated system MV = MV

21. WHOLE BRAIN Now turn to your partner and: Name an object that has little mass but can have a big momentum Name an object that can move very slow but has a very big momentum What is the formula for momentum? What is the Law of Conservation of Momentum?

22. Centripetal Force Centripetal Force- force directed towards the center of the circle for an object moving in a circular motion.

23. Centripetal Acceleration Centripetal Acceleration – Acceleration toward the center of a curved or circular path.

24. Friction Friction - when 2 objects rub together. It generates heat. Example (rub your hands together)

25. Sliding Friction- is when two objects are rubbing against each other. Putting a book flat on a desk and moving it around is an example of sliding friction. SLIDING FRICTION

26. Rolling Friction Rolling friction- is the resistance that occurs when a round object such as a train rolling on a track or a ball rolling on a surface.

27. Static Friction Static friction - Static friction is a force between two objects that are not moving relative to each other.

28. WHOLE BRAIN Turn to your partner and tell them about What happens when you rub your hands sliding friction Rolling friction Static friction Centripetal Acceleration Centripetal Force

29. Air Resistance Air resistance – Like turbulence…….object s slowing down in the wind. Running into the wind.

30. Weight Weight – Changes with gravity. It Is different on every planet.

31. Mass Mass – Always remains the same. Triple Beam balance / electronic scale can measure mass.

32. Law of Gravitation Law of Gravitation - states that any two objects exert a gravitational force of attraction on each other. The moon’s gravitational force causes tides.

33. Gravity Constant Gravitational Acceleration (gravity constant) – 9.8 m/s 2 (If you get thrown out of a plane, you will accelerate 9.8 m/s 2 )

34. Projectiles Projectiles – Objects that are launched and fly through the air (bullets, missiles)

35. WHOLE BRAIN Turn to your partner and discuss Projectiles The gravity Constant The Law of Gravitation Mass Weight Air Resistance