1. MOTION

2. Motion Speed describes Motion

3. Motion Speed describes Motion Describes rate at which an object moves

4. Motion Speed describes Motion Describes rate at which an object moves Calculated by distance/time

5. Motion Speed describes Motion Describes rate at which an object moves Calculated by distance/time s=d/t

6. Motion Speed describes Motion Describes rate at which an object moves Calculated by distance/time s=d/t SI unit of measurement=meters/second

7. Motion Rate of motion varies for different moving objects~ this variation requires appropriate units of measurement to accurately describe an object’s speed

8. Motion For example: m/s works well for describing the speed of a rocket escaping Earth’s atmosphere

9. a rocket’s escape speed is measured in km/s

10. a rocket’s escape speed is measured in km/s & is app. 34 xs faster than the speed of sound (Mach 34)

11. Geological plate movement is expressed in centimeters/year

12. It has taken app. 300 million years for plates to move to where they are today

13. Consider a car traveling at highway speed… miles/hour is the units of measurement given for a car’s speed (in America)

14. most other places use the metric system when expressing car speed

15. A car’s speedometer gives instantaneous speed which is speed at a given point in time

16. Motion Velocity also describes Motion

17. Motion Velocity also describes Motion Describes speed with a directional component

18. Motion Velocity also describes Motion Describes speed with a directional component also calculated by distance/time

19. Motion Velocity also describes Motion Describes speed with a directional component also calculated by distance/time v=d/t

20. Motion Velocity also describes Motion Describes speed with a directional component also calculated by distance/time v=d/t SI unit of measurement=meters/second

21. Traveling 100 ml/hr southbound on I75 to Key West is an example of velocity.

22. Motion Acceleration is another term used to describe motion Describes the rate of change in velocity Calculated by change in velocity/time interval Δ v/ Δ t or v f – v i /t f – t i SI unit of measurement=meters/second/second m/s 2

23. Horses on a moving carousel is an example of motion with constant speed but changing acceleration

24. Motion Force affects Motion by altering speed and/or direction

25. Motion Friction is an example of a force that slows an object’s motion

26. Motion Consider applying the brakes while driving…

27. Motion ~it is the combination of brakes slowing vehicle's acceleration & friction between the tire & the road which slows/stops the vehicle’s motion

28. Motion Consider another force… Gravitational force value=9.8m/s 2

29. Motion Throw a ball up && the coming what happens back down? to the ball’s motion/speed going up

30. Motion Words, sketches, diagrams, data tables, graphs, & equations are used to describe & analyze motion

31. Motion For example: Motion can be graphed on a position-time graph aka distance-time graph

32. Motion For example: Motion can be graphed on a position-time graph aka distance-time graph Time is plotted on the x axis Position (distance) is plotted on the y axis

33. Motion

34. Position-time graphs can be used to find the speed (velocity) & position of an object

35. Motion The slope of a line of the position-time graph is equal to the average speed (average velocity) of the object’s motion.

36. Motion The slope of a line of the position-time graph is equal to the average speed (average velocity) of the object’s motion.

37. Motion The slope of the line can be calculated by Δ distance/ Δtime d f – d i /t f - t i

38. Monday 8-27-12 ~QUIZ tomorrow ~continue with your concept map creations ~transfer post it note layout & content to paper ~each student should have a written splay to study from ~Ch2 Test Friday Sept. 7