Motion

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Motion

  1. 1. Equation Sample Problem <ul><li>Charlie flew from Phoenix to Tucson, a distance of 120 miles, at a constant speed of 120 mph. He then returned at a constant speed of 60. mph. What was his: </li></ul><ul><li>a. trip distance? _____________ </li></ul><ul><li>b. average speed?____________ </li></ul><ul><li>c. displacement? _____________ </li></ul><ul><li>d. average velocity?____________ </li></ul>
  2. 2. Motion Map <ul><li>Each arrow is a moment in time </li></ul><ul><ul><li>Flashbulb and apple </li></ul></ul><ul><li>Length of arrow tells us velocity </li></ul><ul><li>When changing direction, arrows move up </li></ul><ul><li>Begin to read motion maps from the lowest dot that has no arrow pointing to it </li></ul>
  3. 3. Steps to writing a motion map <ul><li>A student walks away from her desk for 5 seconds. </li></ul><ul><li>Pick a origin </li></ul><ul><li>Decide where the object starts in relation to the origin </li></ul><ul><li>Decide on the amount of time between dots </li></ul><ul><li>Draw your arrows </li></ul>
  4. 4. Example
  5. 5. Group Problem 1 <ul><li>Draw a motion map for the following objects motion </li></ul><ul><ul><li>A car is stopped at a stoplight. When the light turns green, the car moves at 3 m/s away from the stoplight. </li></ul></ul>
  6. 6. Answer <ul><li>Where is your origin? </li></ul><ul><li>Is the velocity positive or negative? </li></ul>
  7. 7. Sample Problem 2 <ul><li>A cyclist is moving with a velocity of 4 m/s towards a large tree. Upon reaching the tree, the cyclist quickly turns around and rides away at 6 m/s. </li></ul><ul><ul><li>Where is my origin? </li></ul></ul>
  8. 8. Group Problem <ul><li>Draw a velocity vs time, and position vs time based on the following motion map </li></ul>t = 0
  9. 9. Answer <ul><li>Qualitative or Quantitative? </li></ul>
  10. 10. Graphs Continued <ul><li>Slope tells velocity </li></ul><ul><li>How can you find position from velocity vs time graph? </li></ul>
  11. 11. Example problem
  12. 12. Group Work <ul><li>Create a x vs t graph, and a motion map for the v vs t graph given. </li></ul><ul><li>What is the total displacement of the object? </li></ul>
  13. 13. <ul><li>Object moves with constant positive velocity for 4 seconds. Then, it stops for 2 seconds and returns to the initial position in 2 seconds. </li></ul><ul><li>Create a x vs t graph, v vs t, and motion map for the description given given. </li></ul>

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