Acceleration The rate at which velocity changes.

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Presentation transcript:

Acceleration The rate at which velocity changes. Remember, velocity is speed in a given direction. Increasing Speed: A softball accelerates when the pitcher throws it. Decreasing Speed (Deceleration): A car decelerates when it comes to a stop Changing Direction: A Ferris wheel accelerates because it is continuously changing direction

Calculating Acceleration The change in velocity during each unit of time. Acceleration = final velocity – initial velocity time

If velocity is measured in meters/second and time is measured in seconds, the unit of acceleration is meters per second per second. (m/s2)

Change In Speed Over Time Time (s) Speed (m/s) 1 8 2 16 3 24 4 32 5 40 The speed increases by the same amount each second

Acceleration Graph