Graphing Motion.

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Presentation transcript:

Graphing Motion

Types of Motion Graphs Position vs. Time Velocity vs. Time

Graphing Speed: Distance vs. Time Graphs Speed = Slope = Rise/Run Rise

Graphing Speed: Distance vs. Time Graphs Speed = Slope = Rise/Run Rise=? 600 km 3 hr

Graphing Speed: Distance vs. Time Graphs Speed = Slope = Rise/Run Rise=? 600 km 3 hr Rise/Run = 600 km/3 hr = 200 km/hr

Graphing Speed: Distance vs. Time Graphs Denver Phoenix

Different Slopes Slope = Rise/Run = 0 km/1 hr = 0 km/hr Rise = 2 km Run = 1 hr Rise = 0 km Run = 1 hr Slope = Rise/Run = 2 km/1 hr = 2 km/hr Rise = 1 km Run = 1 hr Slope = Rise/Run = 1 km/1 hr = 1 km/hr

Average Speed = Total distance/Total time = 12 km/6 hr Below is a distance vs. time graph of my position during a race. What was my AVERAGE speed for the entire race? Rise = 12 km Run = 6 hr

Below is a distance vs. time graph for 3 runners. Who is the fastest? Leroy is the fastest. He completed the race in 3 hours

Speed vs. Time Graphs Positive slope = Positive acceleration Line is straight = acceleration is constant Negative slope = negative 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

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.

Rise = -6 m/s Run = 3 s Above is a graph showing the speed of a car over time. 1) How is the speed of the car changing (speeding up, Slowing down, or staying the same)? 2) What is this car’s acceleration? The car is slowing down Acceleration = rise/run = -6m/s ÷3s = -2 m/s2

curved line = accelerating, flat line = constant speed The black and red lines represent a 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?

Above is a graph showing the speed of a car 1)What would a distance vs. time graph for this look like?