1. MOTION: Chapter 11

2. Speed is a scalar quantity

3. Def.  a quantity with a magnitude only (no directional component) Examples: time, speed, temperature, volume, density, mass and energy clarifying example: for units of time (minutes, days, hours, etc.) represent an amount of time but tell nothing of direction.

9. That stunk!?! I was on my way back from Niagra on the Lake, Canada and drove by a cop at 100. What do you think happened?

12. Lab pink sheet What are the variables in this experiment? 1.Distance between A & B 2.Position of A & B 3.Weight 4.Starting point 5.Friction 6.Start technique 7.Ramp angle Types Control OR Experimental Independent OR Dependent

13. Lab B-4 Average Speed –Distance / Time A B distance (cm) A B time (sec)

14. Lab B-4 Predicting Speed (instantaneous)at various Points on the Ramp Instantaneous Speed OR Wing of Car

15. Lab B-4 Determine the relationship between Slope and Speed Average Speed AND Distance & time between Photogates

16. Lab B-4 Distance vs Time Graph Distance A-B (cm ) Time A-B (sec.) Steeper the Slope = faster the speed Speed increases down the ramp

17. Part 3 Part 1 Part 2 Part 4 Describe what is happening during each point of this trip?

19. SUMMARY

24. Velocity is a vector, not scalar Magnitude, or "size" of a vector, is also referred to as the vector's "displacement … Direction indicates how the vector is oriented Vector: def  a quantity that has both magnitude and direction

25. How do we define instantaneous velocity?

26. Begin v. vs time graphs