motion-3-displacement-graphs.pptx........

Distance time and displacement time graph to determine the speed or velocity, also identify different motion from the graph

1. Distance/Displacement - Time Graphs Physics | MOtion

2. Lesson Objective Interpret displacement–time graphs. and Identify when an object is stationary, moving at constant speed, accelerating, or decelerating. Differentiate between distance and displacement . From the graph able to find the (gradient )Speed= Distance/time

3. What is Motion? Relative to the earth: Moving 17,500 mph Relative to the shuttle: Not moving An object's change in _____________ relative to a reference point or time . position

4. Distance and Displacement in 2D Observe the picture and tell the difference

5. Distance vs. Displacement Distance Displacement How far travelled (scalar) How far from origin (vector with direction)

6. Try this | Distance and Displacement You walked 5 km East, turned around and walked 2 km West, turned around again and walked another 4 km East. What is your distance? What is your displacement? Distance Displacement 1 2 3 4 5 6 7 8 11 km 5 + 2 + 4 7 km

7. Graphing Displacement You walked 5 km East, turned around and walked 2 km West, turned around again and walked another 4 miles km. What is your distance? What is your displacement? Position (km) Time 7 6 5 4 3 2 1 Displacement (km)

8. Success criteria I can explain the difference between distance and displacement in my own words All Clear Not clear

9. https://youtu.be/lrHAnr9cYdQ Distance Vs Time graph video

10. Stroboscopic Photographs In a stroboscopic photograph, a new snapshot is captured every ___ seconds and combined to show the motion over a period of time. New Capture every 0.04 sec Circle the part of the motion where this soccer ball is moving the FASTEST Circle the part of the motion where this soccer ball is moving the SLOWEST

11. Stroboscopic Photographs Constant speed or Accelerating (speed up? How do you know? More spacing between pictures = moving faster

12. Predict the Motion… Time 0.0 s 1.0 s 2.0 s 3.0 s Cart A 0.0 m Cart B 2.0 m Cart C 3.0 m Which cart do you think has the best chance of reaching the 10-meter location first?

13. Predict the Motion… What new information do you have about the carts now that you didn’t before? Time 0.0 s 1.0 s 2.0 s 3.0 s Cart A 0.0 m 4.0 m Cart B 2.0 m 4.0 m Cart C 3.0 m 4.0 m Now which cart do you think has the best chance of reaching the 10-meter location first?

14. Predict the Motion… Now which cart do you think has the best chance of reaching the 10-meter location first? What patterns do you see? Can you use these to predict the next position? Time 0.0 s 1.0 s 2.0 s 3.0 s Cart A 0.0 m 4.0 m 7.0 m ?? Cart B 2.0 m 4.0 m 6.0 m ?? Cart C 3.0 m 4.0 m 6.0 m ??

15. Predict the Motion… It’s more than just position, you need multiple frames to see motion Time 0.0 s 1.0 s 2.0 s 3.0 s Cart A 0.0 m 4.0 m 7.0 m 9.0 m Cart B 2.0 m 4.0 m 6.0 m 8.0 m Cart C 3.0 m 4.0 m 6.0 m 9.0 m Distance (m) Time (s) deceleration Constant speed acceleration

16. An object not moving Time Displacement 7 6 5 4 3 2 1 7 6 5 4 3 2 1 Position Rest /stopped

17. An object moving forward constant speed Time 7 6 5 4 3 2 1 Displacement 7 6 5 4 3 2 1 Position Constant Speed

18. An object moving backward Time 7 6 5 4 3 2 1 Displacement 7 6 5 4 3 2 1 Position Constant Speed- opposite direction

19. Showing Velocity Time 7 6 5 4 3 2 1 Displacement 7 6 5 4 3 2 1 Position Higher Constant Speed Lower Constant Speed

20. Time Interpreting Velocity on a Graph Think of the Velocity graph this way: Which one of these balls will fall faster? 5 m 15 m 10 m 15 s 10 s 5 s More Distance In Less Time (Faster) The graph with more steepness is the faster velocity. The less steep, the slower. Distance Less Distance In More Time (Slower) You can use the slope of a line to find Velocity

21. Speeding Up (moving positive) Time 7 6 5 4 3 2 1 Displacement 7 6 5 4 3 2 1 Time Position Acceleration

22. Slowing Down (moving positive) Time 7 6 5 4 3 2 1 Displacement 7 6 5 4 3 2 1 Time Position

23. Try drawing a speed graph that shows an object that travels at a  constant speed , then slows down , then comes to a stop ? D t

24. constant speed deceleration stopped D t A speed graph that shows an object that travels at a  constant speed , then slows down , then comes to a stop ?

25. Try drawing a speed graph that shows an object that   accelerates , then  decelerates , comes to a stop , then moves  backwards at a constant speed ? D t

26. accelerates decelerates stops backwards at a constant speed D t A speed graph that shows an object that   accelerates , then  decelerates , comes to a stop , then moves  backwards at a constant speed ?

27. Speeding Up (moving negative) more challenging Time 7 6 5 4 3 2 1 Displacement 7 6 5 4 3 2 1 Time Position Acceleration (opposite)

28. How are these Similar? d t d t Getting faster because the graph is getting steeper (farther spacing)

29. Slowing Down (moving negative) Time 7 6 5 4 3 2 1 Displacement 7 6 5 4 3 2 1 Time Position

30. Success criteria I can explain the motion of an object from different distance-time graph All Clear Not clear

31. Write down one new thing you learned about today? Write down one question you still have about this topic in your notebook. Remaining Questions

32. Two cars start at the same point. Car A’s graph is steeper than Car B’s. After 5 seconds, what can you say about their speeds and distances? How would the distance–time graph look if an object reverses direction and comes back toward the start? Practice Questions for Next Lesson

33. Displacement vs Time Graphs 1 2 3 4 5 6 1 2 3 4 5 6 Displacement (m) Time (s) 1 2 3 4 5 6 1 2 3 4 5 6 Displacement (m) Time (s) 1 2 3 4 5 6 1 2 3 4 5 6 Displacement (m) Time (s) 1 2 3 4 5 6 1 2 3 4 5 6 Displacement (m) Time (s) A B C D Which graph(s) represent an object moving in the negative direction? Which graph(s) represent an object slowing down?

34. Lesson Takeaways I can describe the difference between distance and displacement I can calculate distance and displacement for 1D motion I can plot constant velocity on a displacement vs time graph I can plot changing velocity on a displacement vs time graph I can use a displacement vs time graph to identify if an object is moving in the positive or negative direction as well as if it is speeding up or slowing down