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# Speed And Velocity2008

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### Transcript

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