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Notes 9.3

Notes 9.3. Acceleration. Changing Velocity. In science, acceleration refers to increasing speed, decreasing speed, or changing direction How can a car be accelerating if its speed is constant at 65 km/hr?. Calculating Acceleration.

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Notes 9.3

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  1. Notes 9.3 Acceleration

  2. Changing Velocity • In science, acceleration refers to increasing speed, decreasing speed, or changing direction • How can a car be accelerating if its speed is constant at 65 km/hr?

  3. Calculating Acceleration • To determine the acceleration of an object, you must calculate its change in velocity per unit of time • Acceleration= final velocity - initial velocity time • As a roller coaster car starts down a slope, its velocity is 4 m/s. But three seconds later, its velocity is 22 m/s in the same direction. What is its acceleration?

  4. Graphing Acceleration • The slanted, straight line on a speed vs time graph tells you that the cyclist is accelerating at a constant rate. (pg 354) • The curved line on a distance vs time graph tells you that the cyclist is accelerating. (pg 355)

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