MOTION

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MOTION

• By Michelle Tass

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Defining Motion

• HOW MOTION IS DEFINED You are surrounded by
  objects that seem to move in many different ways.
  This variety of motion is made up of just three
  basic types.
• 1.) Translational Motion motion is a straight
  line
• 2.) Circular Motion movement around a central
  position
• 3.) Vibrational Motion an object that moves
  back-and-forth from a central position

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GRAPHING

• Distance on Position Vs. Time Graphs
• go to graph

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Interpreting The Position Vs. Time Graph

• The slope of the line is equal to velocity (m/s)
• Slope determines not only how fast, but the
  direction
• Velocity is the rate at which a position changes
  in time
• The graph can be made from written words or words
  can be written to explain the graph

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GRAPHING

• Velocity Vs. Time Graph
• go to graph

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Interpreting The Velocity Vs. Time Graph

• The slope of the line is equal to the
  acceleration (m/s2)
• Acceleration is the total change of velocity with
  time
• Negative acceleration is called deceleration

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GRAPHING

• Acceleration Vs. Time Graph
• go to graph

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Interpreting The Acceleration Vs. Time Graph

• The acceleration vs. time graph is drawn by
  finding the slope on the velocity vs. time graph.
• If an object has constant acceleration of 2 m/s2,
  then for every second the object moves two meters
  per second faster.
• Galileo 9.81 m/s2 acceleration for falling
  object (experiment with falling objects off a
  balcony)

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Rolling Object on Incline Experiment

• Divide students in groups of two
• Have the students set up incline so the entire
  class is at the same height.
• Roll the ball down the incline from 5 different
  levels. (40cm, 55cm, 70cm, 85cm, 100cm)
• Time the object as it rolls from the top to the
  bottom. Take three different times and find the
  average of the three. Alternate partners timing
  in case of error.
• Graph the results using the three different kinds
  of graphs

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Combining All Three Types of Graphs(Position,
Velocity, Acceleration Vs. Time)

• Use this question to draw the graphs
• A car starts form rest, accelerates at a constant
  rate for 5.0 seconds. Sketch the Acceleration Vs.
  Time Graph first then the Velocity Vs. Time and
  the Position Vs. Time Graph
• results of this example on graphs