speedandvelocity-110216035528-phpapp02.ppt
- 1. Speed and velocity 19 February 2025 Copy and complete the following table: Quantity Symbol Unit Symbol Equation Speed Distance Time
- 2. Quantity Symbol Unit Symbol Equation Speed s metre per second m/s s=d/t Distance d metre m d=st Time t second s t=d/s
- 4. Definition • Speed is the rate of change of distance time distance speed
- 5. t d s
- 7. 2 2 1 r m Gm mg Why I don’t like formula triangles Now stick that in a triangle…
- 8. Can you calculate speed? • Usain Bolt can run 100 m in 9.58 second. How fast does he run?
- 10. Two types of speed • How fast was Usain Bolt running at the start? • How fast was he running in the middle? • How fast was he running at the finish?
- 12. Instantaneous speed • This is the speed at any given moment (or instant!) • A speedometer in a car gives the instantaneous speed but you would have to calculate the average speed (most GPS systems can do this for you)
- 13. Displacement • The difference between the starting point and finishing point. It is distance with direction
- 14. How far does a football travel during a match? • Distance: many kilometers • Displacement: 0
- 15. Velocity • The rate of change of displacement • OR • How fast you are going in a particular direction
- 16. Velocity t x v
- 19. Graphing movement February 19, 2025
- 20. Learning objective • Draw and interpret distance-time graphs • Draw and interpret velocity-time graphs
- 21. Define these terms… • Distance • Displacement • Speed • Velocity
- 22. The Moving Man
- 31. To do • Using graph paper draw a distance-time graph of your journey to school • Now try a velocity-time graph of the same journey