Acceleration.

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Presentation transcript:

Acceleration

Bell Ringer (9/16) Describe the motion of the graph below.

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Acceleration

Acceleration The rate at which an object changes its velocity and/or direction

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Acceleration Acceleration occurs when an object Speeds up (+) Slows down (-) Change in direction

Galileo rolled balls down a series of ramps. As the ramps got higher, the balls rolled at a greater speed. Their speed increased. Galileo said that they were….. Accelerating.

Positive & Negative Acceleration Positive acceleration “speeding up” Negative acceleration “slowing down”

Graphing Acceleration Distance Time Time Velocity

Graphing Acceleration Distance Time Time Velocity

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Bell Ringer 9/19 Which of the following is not accelerating? A car slowing to a stop at a stop sign You riding a Ferris Wheel The moon orbiting the Earth A cyclist riding constantly at 2 m/s on a straight path

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