Motion and Force Chapter Twelve: Distance, Time, and Speed

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Presentation transcript:

Motion and Force Chapter Twelve: Distance, Time, and Speed Chapter Thirteen: Forces Chapter Fourteen: Force and Motion

Chapter Twelve: Distance, Time, and Speed 12.1 Distance, Direction, and Position 12.2 Speed 12.3 Graphs of Motion

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.

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.

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”

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.

Technology Connection Roller Coasters: The Physics Behind the Thrill 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.

Motion with Changing Speed Investigation 12B Motion with Changing Speed How do we describe motion for which the speed is not constant?