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Published byOwen Gallagher Modified over 9 years ago
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Average and Instantaneous Velocity
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Average or Instantaneous? Instantaneous velocity : the velocity of a moving object at one specific moment. Average velocity: velocity measured over a certain time interval. When might average velocity be LESS important than instantaneous velocity? Issuing speeding tickets When might average velocity be MORE important than instantaneous velocity? Calculating the length of a trip
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Calculating average velocity from a position-time graph: Each section of the graph has a different slope representing individual velocities at that stage of the journey. The average velocity of the total graph or trip is found by using the beginning and end points.
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Calculating instantaneous velocity from a position-time graph Draw a tangent line intersecting (but not crossing) the point (“time”) for which you wish to determine instantaneous velocity. Pick two points on this tangent line and calculate the slope.
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