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

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Presentation transcript:

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) sf = 10 m/s si = 0 m/s t = 2 s – 0 s = 2 s  Speed is increasing by 5 m/s every second.

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.

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.

During what time periods is the person accelerating 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

What is the acceleration from t = 0 s to t = 3 s?

During what time intervals is the speed changing? During what time intervals is the speed constant?