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# 6-4 Speed & Velocity

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### 6-4 Speed & Velocity

1. 1. Warm Up<br />Sam walks 10 meters down the hall. Then turns right and walks 25 meters to get to the cafeteria. What is Sam’s distance traveled and displacement?<br />
2. 2. Warm Up<br />Will an airplane have a greater velocity flying into the wind or in the same direction as the wind. <br />The wind will add to the velocity of the airplane. <br />Velocities add in the same direction.<br />Velocities subtract when opposite directions<br />
3. 3. 6-4 Graphing MotionSpeed & Velocity<br />Compare and Contrast average speed with instantaneous speed.<br />Interpret distance-time graphs.<br />
4. 4. Average Speed vs. Instantaneous speed<br />Average speed- how fast something travels over the entire trip.<br />Instantaneous speed- how fast something travel at a particular instant.<br />Velocity – speed with direction<br />
5. 5. d vs. t graphs<br />Graph the motion <br />use the slope to interpret the relationship between the variables (d & t)<br />*steep slope <br />Fast speed <br />*gentle slope <br />Slow speed <br />
6. 6. d<br />d<br />d<br />d<br />t<br />t<br />t<br />t<br />When interpreting the motion answer:<br /><ul><li>As time goes by, distance (d  or )
7. 7. The line shows relationship (constant or changing)
8. 8. Moving forward (d)
9. 9. No motion (d stays same)
10. 10. Moving backward (d)
11. 11. Moving forward (d)
12. 12. Constant speed (straight)
13. 13. Changing speed (curved)
14. 14. Constant speed (straight)
15. 15. Constant speed (straight)
16. 16. 0 m/s</li></li></ul><li>d<br />d<br />d<br />t<br />t<br />t<br /><ul><li>Moving forward (d)
17. 17. Moving backward (d)
18. 18. Moving backward (d)
19. 19. changing speed (curved)
20. 20. changing speed (curved)
21. 21. changing speed (curved)
22. 22. (-) acceleration
23. 23. (+) acceleration
24. 24. (-) acceleration</li></li></ul><li>AB<br /><ul><li>Move forward
25. 25. Constant speed
26. 26. ΔY</li></ul>10m<br />1m/s<br />=<br />=<br />10s<br />ΔX<br />BC<br /><ul><li>At rest
27. 27. Constant speed
28. 28. 0m/s</li></li></ul><li>CD<br /><ul><li>Moving backward
29. 29. Constant speed
30. 30. ΔY</li></ul> 5m<br />1m/s<br />=<br />=<br />ΔX<br /> 5s<br />DE<br /><ul><li>Moving forward
31. 31. Changing speed
32. 32. (+) acceleration</li></li></ul><li>EF<br /><ul><li>Moving backward
33. 33. Constant speed
34. 34. ΔY</li></ul>25m<br />5m/s<br />=<br />=<br />ΔX<br /> 5s <br />FG<br /><ul><li>Moving forward
35. 35. Constant speed
36. 36. ΔY</li></ul>10m<br />2m/s<br />=<br />=<br />ΔX<br />5s<br />GH<br /><ul><li>Moving forward
37. 37. Constant speed</li></ul>12.5m<br /><ul><li>ΔY</li></ul>=<br />1m/s<br />=<br />ΔX<br />12.5s<br />
38. 38. Which line had the fastest speed?<br /><ul><li>EF
39. 39. Steepest slope</li></ul>Distance increases?<br /><ul><li>Moving forward</li></ul>Distance decreases?<br /><ul><li>Moving backward</li></ul>Straight line?<br /><ul><li>Constant speed</li></ul>Curved line?<br /><ul><li>Changing speed</li></ul>d vs. t graph shows?<br /><ul><li>Speed and direction</li></li></ul><li>6-3 Summary<br />What is average speed?<br />Total distance traveled during total time.<br />What is instantaneous speed?<br />Speed traveling at an instant in time.<br />What is the slope of a distance vs. time graph?<br />Slope of a d vs. t graph is speed.<br />