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Objective

Objective. SWBAT use velocity-time graphs to determine an object’s acceleration. Review. acceleration: a change in an object’s speed (speeding up OR slowing down). Speed-Time (Velocity-Time) Graph. Interpreting Distance-Time Graphs. From point A ( t = 0 s) to point B ( t = 2 s)

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Objective

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  1. Objective • SWBAT use velocity-time graphs to determine an object’s acceleration.

  2. Review acceleration: a change in an object’s speed (speeding up OR slowing down)

  3. Speed-Time (Velocity-Time) Graph

  4. Interpreting Distance-Time Graphs • From point A (t = 0 s) to point B (t = 2 s) • sf= 10 m/s • si= 0 m/s • t = 2 s – 0 s = 2 s  Speed is increasing by 5 m/s every second.

  5. Interpreting Distance-Time Graphs • From point B (t = 2 s) to point C (t = 4 s) • sf= 10 m/s • si= 10 m/s • t = 4 s – 2 s = 2 s  Object is moving forward at a constant speed of 10 m/s. It is not getting faster or slower.

  6. Interpreting Distance-Time Graphs • From point C (t = 4 s) to point D (t = 6 s) • sf= 4 m/s • si= 10 m/s • t = 6 s – 4 s = 2 s  Speed is decreasing by 3 m/s every second.

  7. During what time periods is the person accelerating? From 0 s to 2 s AND from 4 s to 6 s (slowing down) • During what time periods is the person moving at a constant speed? From 2 s to 4 s

  8. What is the acceleration from t = 0 s to t = 3 s? • What is the acceleration from t = 3 s to t = 8 s? • What is the acceleration from t = 8 s to t = 13 s? • What is the acceleration from t = 13 s to t = 17 s?

  9. During what time intervals is the speed changing? • During what time intervals is the speed constant?

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