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Graphing Acceleration

Graphing Acceleration. Can use 2 kinds of graphs Speed vs. time Distance vs. time. Graphing Acceleration: Speed vs. Time Graphs. If speed is changing with time = accelerating If the line is straight = acceleration is constant

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Graphing Acceleration

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  1. Graphing Acceleration • Can use 2 kinds of graphs • Speed vs. time • Distance vs. time

  2. Graphing Acceleration:Speed vs. Time Graphs • If speed is changing with time = accelerating • If the line is straight = acceleration is constant • So what is happening below?

  3. Graphing Acceleration:Speed vs. Time Graphs Rise = 4 m/s Run = 2 s • In Speed vs. Time graphs: • Acceleration = Rise/Run • = 4 m/s ÷ 2 s = 2 m/s2

  4. Graphing Acceleration:Distance vs. Time Graphs • On Distance vs. Time graphs a curved line means the object is accelerating. • Curved line also means your speed is increasing. Remember slope = speed.

  5. How is the speed of this car changing? • Speeding up • Slowing Down • Staying the same

  6. Calculate this car’s acceleration. • 6 m/s • -6 m/s • 2 m/s2 • -2 m/s2

  7. Explanation of Answer Run = 3 s Rise = -6 m/s Acceleration = rise/run = -6m/s ÷3s = -2 m/s2

  8. Question: The black and red lines represent objects that are accelerating. Black is going a greater distance each second, so it must be speeding up. Red is going less each second, so must be slowing down Remember: in distance vs. time graphs: curved line = accelerating, flat line = constant speed • Which line represents an object that is accelerating?

  9. Question: Difficult… Above is a graph showing the speed of a car over time. 1)What would a distance vs. time graph for this look like?

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