2. Chapter Menu Chapter Introduction Lesson 1Lesson 1Describing Motion Lesson 2Lesson 2Position and Motion Lesson 3Lesson 3Acceleration Chapter Wrap-Up

3. Chapter Introduction What are some ways to describe motion? How can you tell is an object is in motion? What affects motion of an object?

4. Chapter Introduction What do you think? Before you begin, decide if you agree or disagree with each of these statements. As you view this presentation, see if you change your mind about any of the statements.

5. Chapter Introduction 1.Displacement is the distance an object moves along a path. 2.The description of an object’s position depends on the reference point. 3.Constant speed is the same thing as average speed. Do you agree or disagree?

6. Chapter Introduction 4.Velocity is another name for speed. 5.You can calculate acceleration by dividing the change in velocity by the change in distance. 6.An object accelerates when either its speed or its direction changes. Do you agree or disagree?

7. Lesson 1-3 Is the man in the boat in motion?

8. Lesson 1-3 Did the man move? Explain.

9. Lesson 1-3 The man in the boat is not in motion compared to his fishing pole. He is in motion compared to the buoy.

10. Lesson 1-1 A reference point is a starting point that can be used to locate a place or thing.reference point –It is a stationary and fixed (still and not moving) object that is used for comparison to determine if an object is in motion.. Describing Position (cont.)

11. Lesson 1-1 A complete description of your position includes a distance, a direction, and a reference point. Describing Position (cont.)

12. Lesson 1-1 An object’s position is described by a reference direction, such as toward the slide. Describing Position (cont.)

13. Motion is the process of changing position. An object is in motion when the distance from another object is changing..Motion Sit as still as you possibly can. Are you moving? Explain. Is your kitchen table in motion? Explain. Describing Changes in Position

14. Lesson 1-3 Displacement is the difference between the initial (first) position and the final position of an object.Displacement Distance depends on the path taken. Displacement depends only on the initial and final positions. Describing Changes in Position (cont.)

15. Lesson 1-3

17. Lesson 1 - VS In order to describe the position of an object you need A reference point, A reference direction, Distance from reference point.

18. Lesson 1 - VS An object is in motion if its position changes relative to a reference point.

19. Lesson 1 - VS The distance an object moves and the object’s displacement are not always the same.

20. Lesson 1 – LR2 A.motion B.reference point C.displacement D.direction Which of these refers to the difference between the initial position and the final position of an object?

21. Lesson 1 - Now 1.Displacement is the distance an object moves along a path. 2.The description of an object’s position depends on the reference point. Do you agree or disagree?

22. Lesson 2 Reading Guide - KC What is speed? How can you use a distance-time graph to calculate average speed? What are ways velocity can change? Speed and Velocity

23. Lesson 2 Reading Guide - Vocab speed constant speed instantaneous speed average speed velocity Speed and Velocity

24. Lesson 2-1 SpeedSpeed is a measure of the distance an object travels in a unit of time. What is speed?

25. Lesson 2-1 You can calculate speed by dividing the distance traveled by the time it takes to go that distance. Speed = Distance/Time What is speed? (cont.)

26. Lesson 2-1 Instantaneous speed is speed at a specific instant in time.Instantaneous speed Average speed is the total distance traveled divided by the total time taken to travel that distance.Average speed What is speed? (cont.)

27. Lesson 2-3 VelocityVelocity is the speed and the direction of a moving object. Ex: A car was traveling 65 mph Neast Ex: The ball was thrown upwards at 5 m/s Velocity velocity from Latin velocitas, means “swiftness, speed”

28. Lesson 2-3 Velocity (cont.) Velocity changes when the speed of an object changes, when the direction that the object moves changes, or when both the speed and the direction change.

29. Lesson 2-2 Graphs that show comparisons between distance and time are called distance-time graphs. Constant speed is shown as a straight line on a distance- time graph. Distance-Time Graphs

30. Lesson 2-2 You can use distance-time graphs to compare the motion of two different objects. The steeper the slope of the line indicates a faster speed. Distance-Time Graphs (cont.)

31. Lesson 2-2 You can use distance-time graphs to calculate the average speed of an object.

32. Lesson 2-2 Distance-Time Graphs (cont.) If the speed of an object changes instead of being constant, its motion on a distance-time graph is a curved line.

33. Lesson 2-3 Velocity (cont.) How can velocity change?

34. Lesson 2 - VS Speed is a measure of the distance an object travels in a unit of time. You can describe an object’s constant speed, instantaneous speed, or average speed. A distance-time graph shows the speed of an object.

35. Lesson 2 - VS Velocity includes both the speed and the direction of motion.

36. Lesson 2 – LR1 A.speed B.constant speed C.instantaneous speed D.average speed The total distance traveled divided by the total time taken to travel that distance is known as which of these?

37. Lesson 2 – LR2 A.units of speed B.constant speed C.units of time D.average speed Units of speed are units of distance divided by which of these?

38. Lesson 2 – LR3 A.a wavy line B.a crooked line C.a straight line D.a curved line How is constant speed represented on a distance-time graph?

39. Lesson 2 - Now 3.Constant speed is the same thing as average speed. 4.Velocity is another name for speed. Do you agree or disagree?

40. Lesson 3 Reading Guide - KC What are three ways an object can accelerate? What does a speed-time graph indicate about an object’s motion? Acceleration

41. Lesson 3 Reading Guide - Vocab acceleration Acceleration

42. Lesson 3-1 Acceleration is a measure of how much the velocity of an object changes in a unit of time.Acceleration An object accelerates when its velocity changes as a result of increasing speed, decreasing speed, or a change in direction. Acceleration—Changes in Velocity

43. Lesson 3-1 Acceleration has a direction and can be represented by an arrow. Acceleration—Changes in Velocity (cont.)

44. Lesson 3-1 Acceleration—Changes in Velocity (cont.) What are three ways an object can accelerate?

45. Lesson 3-2 Acceleration is a change in velocity during a time interval divided by the time interval during which the velocity changes. Calculating Acceleration

46. Lesson 3-2 Acceleration is in the direction of motion if it is positive and opposite the direction of motion if it is negative. Calculating Acceleration (cont.)

47. Lesson 3-3 A speed-time graph shows how speed changes over time. A speed-time graph has time on the horizontal axis—the x-axis, and speed on the vertical axis—the y axis. Speed-Time Graphs

48. Lesson 3-3 Speed-Time Graphs (cont.) horizontal from Greek horizein, means “limit, divide, separate” vertical from Latin verticalis, means “overhead”

49. Lesson 3-3 An object at rest is not moving, so its speed is always zero. Speed-Time Graphs (cont.)

50. Lesson 3-3 For an object moving at constant speed, the speed-time graph is a horizontal line. Speed-Time Graphs (cont.)

51. Lesson 3-3 The line on the speed-time graph for an object that is speeding up has an upward slope. Speed-Time Graphs (cont.)

52. Lesson 3-3 Speed-Time Graphs (cont.) The line on the speed-time graph for an object that is slowing down has a downward slope.

53. Lesson 3-3 Speed-Time Graphs (cont.) What does a speed-time graph show about the motion of an object?

54. Lesson 3-4 There are several ways to describe motion. You can describe position by direction and distance from a reference point. You can compare distance and displacement to find average speed. You can describe velocity by speed and direction. Summarizing Motion

55. Lesson 3 - VS An object accelerates if it speeds up, slows down, or changes direction.

56. Lesson 3 - VS Acceleration in a straight line can be calculated by dividing the change in speed by the change in time.

57. Lesson 3 - VS A speed-time graph shows how an object’s speed changes over time.

58. Lesson 3 – LR1 A.increasing speed B.decreasing speed C.a change in direction D.all of the above An objects accelerates when its velocity changes as a result of which of these?

59. Lesson 3 – LR2 A.the horizontal axis (the x-axis) B.the vertical axis (the y-axis) C.both of these D.neither of these On a speed-time graph, where is time located?

60. Lesson 3 – LR3 Which of these refers to a change in velocity during a time interval divided by the time interval during which the velocity changes? A.acceleration B.speed C.velocity D.none of these

61. Lesson 3 - Now 5.You can calculate acceleration by dividing the change in velocity by the change in distance. 6.An object accelerates when either its speed or its direction changes. Do you agree or disagree?

62. Chapter Review Menu Key Concept Summary Interactive Concept Map Chapter Review Standardized Test Practice

63. The BIG Idea The motion of an object can be described by the object’s position, velocity, and acceleration.

64. Key Concepts 1 An object’s position is its distance in a certain direction from a reference point. The position of an object in two dimensions can be described by choosing a reference point and two reference directions, and then stating the distance along each reference direction. The distance an object moves is the actual length of its path. Its displacement is the difference its initial position and its final position. Lesson 1: Position and Motion

65. Key Concepts 2 Lesson 2: Speed and Velocity Speed is the distance an object moves in a unit of time. An object moving the same distance each second is moving at a constant speed. The speed of an object at a certain moment is its instantaneous speed. You can calculate an object’s average speed from a distance-time graph by dividing the distance the object travels by the total time it takes to travel that distance. Velocity changes when speed, direction, or both speed and direction change.

66. Key Concepts 3 Acceleration is a change in velocity over time. An object accelerates when it speeds up, slows down, or changes direction. A speed-time graph shows the relationship between speed and time and can be used to determine information about the acceleration of an object. Lesson 3: Acceleration

67. Chapter Review – MC1 A.displacement B.position C.reference direction D.reference point What term refers to a starting point that can be used to locate a place or thing?

68. Chapter Review – MC2 A.three B.one C.two D.none of these Distance and displacement are equal only if the motion is in how many directions?

69. Chapter Review – MC3 A.comparisons between the motion of two objects B.the average speed of an object C.comparisons between distance and time D.all of the above Which of the below can be illustrated with a distance-time graph?

70. Chapter Review – MC4 A.It is positive. B.It is negative. C.The object is at rest. D.The speed-time graph has a downward slope. If acceleration is in the direction of motion, which of these is true?

71. Chapter Review – MC5 A.the horizontal axis (the x-axis) B.the vertical axis (the y-axis) C.Speed is not indicated on a speed-time graph. D.The speed is the slope of the line. Where is speed located on a speed-time graph?

72. Chapter Review – STP1 A.the positive direction B.the negative direction C.the reference direction D.none of these When you describe an object’s position, the opposite direction is which of these?

73. Chapter Review – STP2 A.displacement B.reference point C.motion D.velocity Which term refers to the process of changing position?

74. Chapter Review – STP3 A.velocity B.constant speed C.average speed D.instantaneous speed Which of these describes the speed and the direction of a moving object?

75. Chapter Review – STP4 A.the speed of an object changes B.the direction an object moves changes C.both the speed and direction of an object changes D.all of the above Which of these results in a change of velocity?

76. Chapter Review – STP5 A.direction B.speed C.acceleration D.velocity Which term refers to a measure of how much the velocity of an object changes in a unit of time?