Speed and Velocity

Speed and Velocity

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  • Speed
  • Average Speed
  • Istantaneous Speed 
  • 0      5     10
  • 15     
  • 20    25    
  • 30
  • 35    40    45
  • Speed is the distance traveled over time. The standard unit for distance is the meter. The standard unit for time is seconds.  Speed = Distance / Time
  • Graphing Speed
  • Distance --->
  • Slope --->
  • Average speed is used when speed changed twice or more. Most things that are moving change speed more than one time. Average Speed (v) = Total Distance / Total Time
  • Velocity
  • N
  • Instantaneous speed is the rate of an object moving at any given time.  When you look at a speedometer and see different speeds at different times, you are looking at the instantaneous speed.
  • Speed vs. Velocity
  • When graphing speed, the time goes on the horizontal axis (x-axis) and the distance goes on the vertical axis (y-axis). The line is called the slope. The slope represents the speed.  Slope = Rise / Run = Y2-Y1 / X2-X1
  • Speed ^
  • W
  • Velocity is speed in a given direction. Velocity can change over time. Change in velocity can be caused when speed or direction changes. Arrows called vectors are used to indicate velocity.
  • S
  • E
  • Speed is the magnitude of velocity because speed doesn't have direction and velocity does. Velocity is a vector because it has direction and speed. When something is moving, the velocity is always changing,
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