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# Speed And Velocity2008

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### Speed And Velocity2008

1. 1. <ul><li>S: Pinewood Derby </li></ul>
2. 2. Speed and Velocity March 6, 2008
3. 3. Objectives <ul><li>Define distance, time, speed, and velocity </li></ul><ul><li>Calculate speed </li></ul><ul><li>Distinguish between speed and velocity </li></ul><ul><li>Explain constant speed and average speed </li></ul><ul><li>Read a distance time graph </li></ul>
4. 4. <ul><li>Motion is measured by time and distance </li></ul>
5. 5. Distance <ul><li>the separation of two positions </li></ul>
6. 6. Distance <ul><li>Commonly measured in </li></ul><ul><li>meters </li></ul><ul><li>kilometers </li></ul>
7. 7. Time <ul><li>the period between two events </li></ul>
8. 8. Time <ul><li>Commonly measured in </li></ul><ul><li>Seconds </li></ul><ul><li>Minutes </li></ul><ul><li>Hours </li></ul>
9. 9. Speed <ul><li>the measure of how fast an object moves as it changes its position </li></ul>
10. 10. Speed <ul><li>Commonly measured in </li></ul><ul><li>Meters per minute (m/m) </li></ul><ul><li>Kilometers per hour (km/h) </li></ul>
11. 11. <ul><li>Speed = Distance Time </li></ul>
12. 12. Speed Time = 0 seconds meters 25 20 30 15 35 10 5 0
13. 13. Speed Time = 5 seconds meters 25 20 30 15 35 10 5 0
14. 14. Speed Time = 10 seconds meters 25 20 30 15 35 10 5 0
15. 15. Speed Time = 15 seconds meters 25 20 30 15 35 10 5 0
16. 16. Constant Speed <ul><li>speed that does not change </li></ul>
17. 17. Constant Speed
18. 18. Average Speed <ul><li>the total distance traveled divided by the total time of travel </li></ul>
19. 19. Average Speed
20. 20. Speed & Velocity How is speed different from velocity?
21. 21. Velocity <ul><li>describes both the speed and its direction </li></ul><ul><li>90 km/h = speed </li></ul><ul><li>90 km/h west = velocity </li></ul>