Ch12 speedsection3
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Transcript

  • 1.  
  • 2. Motion and Force
    • Chapter Twelve: Distance, Time, and Speed
    • Chapter Thirteen: Forces
    • Chapter Fourteen: Force and Motion
  • 3. Chapter Twelve: Distance, Time, and Speed
    • 12.1 Distance, Direction, and Position
    • 12.2 Speed
    • 12.3 Graphs of Motion
  • 4. 12.3 Graphs of Motion
    • A position vs. time graph that is a straight line always means the object moves the same distance during each time period.
  • 5. 12.3 Graphs of Motion
    • You can use position vs. time graphs to compare the motion of different objects.
    • The steeper line on a position vs. time graph means a faster speed.
  • 6. 12.3 Slope
    • The steepness of a line is measured by finding its slope.
    • The slope of a line is the ratio of the “rise” to the “run”
  • 7.  
  • 8.  
  • 9. 12.3 Graphs of changing motion
    • Objects rarely move at the same speed for a long period of time.
    • A speed vs. time graph is also useful for showing the motion of an object that is speeding up
    • or slowing down.
  • 10. Technology Connection
    • That first roller coaster was all wood and ran in a straight line.
    • Roller coasters are now made of wood or steel, and the tracks include a variety of twists and turns and loops and drops that make the ride scary and thrilling.
    Roller Coasters: The Physics Behind the Thrill
  • 11. Investigation 12B
    • How do we describe motion for which the speed is not constant?
    Motion with Changing Speed