3. Review 1.This is the point that all motion will be measured relative to. A. Position B. Reference C. Displacement D. Distance

4. Review 2.A point some distance and direction from my reference point. A.Position B.Reference C.Displacement D.Distance

5. Review 3.The change in position. A.Position B.Reference C.Displacement D.Distance

6. Review 4.The total distance traveled. A.Position B.Reference C.Displacement D.Distance

7. Average Speed Def: Total distance covered divided by the total time Path does not matter for speed! What is the average speed of the car over 5 sec? Total distance/total time 60m/5sec = 12m/sec

8. Velocity Def: the speed of an object in a certain direction –Vector quantity –Units: m/s –Slope of the position vs. time graph –Symbol: V Example: 100mph to the East If the speed or direction changes, the velocity changes

9. Where is the car moving with the greatest velocity? (time frame)

10. Speed vs. Velocity Speed Scalar quantity Unit: m/s Slope of the distance vs. time graph Symbol: s Velocity Vector quantity Unit: m/s Slope of the position vs. time graph Symbol: v

11. Instantaneous Velocity Def: the velocity of an object at a particular moment (snap shot) Example: the speed on the speedometer, and your direction

12. Questions What is the What is theinstantaneous velocity of the car at 3.5 sec? What is the What is the average velocity of the car over 4 sec?

13. Questions A: SpeedB: VelocityC: Both 1.Depends on time, distance, and direction 2.Only depends on time and distance 3.Has the units m/s 4.Can be found using the position vs. time graph 5.Can be found using the distance vs. time graph

14. Formula Formula: V1 = d t Speed or Velocity (m/s) Distance (m) Time (s) Calculating Speed or Velocity S1 = d t

15. 4-Step Approach to solving problems Step 1Read the problem, list the variables… what are you trying to find? Step 2Write the formula Step 4Write answer with correct units! Step 3Plug-n-Chug, substitute numbers into the formula and solve

16. Class Practice  What is the speed of an electric scooter that travels 20 meters in 2 seconds?  A ball is thrown so that it travels 120 meters in 8 seconds. How fast did it travel?

17. Class Practice  If a girl walks at a rate of 2 m/s, how long will she take to walk 100 meters?  A motorcycle travels at 25 m/s for 10 minutes (600 s). How far does it travel?

18. 1. A Cheetah runs 120 meters in 2 seconds. What is its speed? 2. Turtles walk at a speed of 20 meters per hour. How long does it take a turtle to travel 10 meters? 3. Your bowling ball is rolling 2.5 m/s toward the pins. How long does it take to travel 12 m? 4. If it takes 5 minutes to drive to the store at 35 mph (miles per hour), how far away is the store? Independent Practice / Exit Ticket

19.  Mindy drives 55 mph for 30 minutes and then drives 65 mph for 2 hours. How far does she drive?  If Jim travels 13 km in 8 minutes, and Sarah travels 24 km in 17 minutes, who is going faster?