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P-t Graph lab extended

P-t Graph lab extended. Classwork -homework. Motion Detectors. How do they work?. Sound it emitted from motion detectors (MD). Very high pitch, way above what we can hear. A clicking sound is added to tell us that MD is issuing sounds Spread out in a cone, starting from grill of MD

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P-t Graph lab extended

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  1. P-t Graph lab extended Classwork-homework

  2. Motion Detectors How do they work?

  3. Sound it emitted from motion detectors (MD) • Very high pitch, way above what we can hear. • A clicking sound is added to tell us that MD is issuing sounds • Spread out in a cone, starting from grill of MD • When sound hits an object, some is bounced back to MD

  4. The rest of the story • Sound travels very fast, but is constant at a certain temp. (346 m/s at room temp) • Computer calculated displacement by the computer using v = d/t, calculation done very fast. • Sounds are continually emitted, many times per second. Information about displacement is continually recorded

  5. Record answers to any following question on either separate sheet of paper or in comp book Ask the teacher, before you continue

  6. Questions About the Motion detector • What is the point of reference? (where is zero on the graph) • Relative to the motion detector, which way do you move in order to travel in the positive direction?

  7. For questions 4-15: • Sketch a position-time graph for each of the following types of info. • You may use the MD to help confirm or determine your answer. 3. There are limitations to the types of motion that can be recorded by MD. What motion can not be recorded by MD? Why not?

  8. Question 4 • Graphs of an object at restat 2m, at (4)m, at (-2)m

  9. Question 6 • Graph showing constant negative motion, starting from the 3 meter mark • In negative motion, the position value gets less positive over time

  10. Question 7 • Graph showing object moving positively at a very slow constant rate of motionStart from (2) meter mark

  11. Question 8 • Graph showing object moving at a very fast negative constant motionStart at the 4 m mark

  12. Q9 • What feature about the graph is the same about all graphs that show constant velocity?

  13. Question 10 • What is the difference in the graphs between objects at rest, moving slowly, and those moving fast?

  14. Q11 • Graph showing someone moving in positive direction and speeding up, start from 1.0 meter mark. • To show this well using MD, Change the size of the step. Slow = small steps, fast = large steps

  15. Question 12 • Graph showing an object moving in negative direction and speeding up(start from 4 m mark)

  16. Q13 Graph of object that is moving forward but slowing down(start at 0.5 meter mark) This means the person has to be moving before the recording takes place

  17. Q15 • Graph of object that moves negatively and slows down(start at 4 meter mark) • This means the person has to be moving before the recording takes place

  18. Question 15 • What feature do all graphs have that show change in motion?

  19. Q16 • What other word means ‘a change in motion of the object’?

  20. Q17All real graphs of motion will be composed of different sections that consist on a single type of motion Divide this graph up into sections that consist of a single type of motion. How many sections of the graph are there?

  21. Question 18 Identify the type of motion that is described in each section of following graph • Indicate direction: • Indicate if the velocity is constant or not • Indicate if object is at rest, or has positive/negative motion • Indicate if object is speeding up or slowing down

  22. Q18 • Position –time graph, each section is a different color and number 3 1 5 2 4 6

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