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Speed/Velocity

Speed/Velocity. Distance- the length of a path between two points. Displacement- the length and direction that an object has moved from its starting point. X. Distance. Displacement. X. X f. X 0. Speed : A position change in a certain amount of time. Speed = distance / time or v = d/t

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Speed/Velocity

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  1. Speed/Velocity • Distance- the length of a path between two points. • Displacement- the length and direction that an object has moved from its starting point. X Distance Displacement X

  2. Xf X0 Speed: A position change in a certain amount of time. Speed = distance / time or v = d/t - usually measured in m/s Average Speed: d/t, where d is the total distance and t is the total time elapsed.

  3. Example- A jogger jogs 2 km in 10 min. Calculate the speed. Given: Distance = 2 km Time = 10 min Find: Speed Solution: S = d / t S = 2 km /10 min S = .2 km/min

  4. Instantaneous Speed: The speed at a particular instant (this quantity is what a speedometer measures).

  5. Velocity: Tells you how fast and what direction something is moving. Velocity = displacement/time, plus the direction (north, south ... etc.) v = d /t

  6. Slope = rise/run =distance/time = speed Distance (m) XFinal XInitial Time (min) d d d d 3 2 1 3 2 1 3 2 1 3 2 1 0 1 2 3 4 5 t t 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5 t t NOT MOVING Moving away at a constant speed Moving back at a constant speed Not possible!

  7. d t Instantaneous Speed

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