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Acceleration = a change in speed or direction: (Speeding up…Slowing down… or changing direction). Acceleration is typically measured in m/s/s or meters/second^2.
Speeding Up
Speeding Up
Slowing Down
Slowing Down
Changing Direction
Changing Direction
Average acceleration is the rate at which velocity changes. Average acceleration is the change in velocity divided by an elapsed time. For instance, if the velocity of a marble increases from 0 to 60 cm/s in 12 seconds, its average acceleration would be 5 cm/s/s. This means that the marble’s velocity will increase by 5 cm/s every second. See the graph above.
V0 = starting velocity.
V is the final velocity.
Triangle t means = change in time.
Sample problem: At 12:00, a rocket begins to accelerate from 30 mph. At 12:05 the rocket is traveling at 280 mph. What is the acceleration of the rocket?
a = v - vo / t
a = 280 - 30 / 5
a = 250 / 5
a = 50 mph
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