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11 3 Acceleration Section

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11 3 Acceleration Section

1. 1. Acceleration 11.3 Acceleration 11-3
2. 2. Acceleration = <ul><li>A change in speed ( Velocity ) or direction in an amount of time </li></ul><ul><li>Speed 2 - Speed1 / t </li></ul><ul><li>V2 – V1 / t </li></ul>
3. 3. Acceleration <ul><li>Units = m / s 2 </li></ul><ul><li>Units = </li></ul><ul><li>meters / second /second </li></ul>
4. 4. Change in speed Formula <ul><li>Change in speed = Final Speed – Initial Speed </li></ul><ul><li>Change in speed = </li></ul><ul><li>10 m/sec - 4 m/sec </li></ul><ul><li>Change in speed = </li></ul><ul><li>6 m/sec </li></ul>
5. 5. Slow down—is accelerating <ul><li>Acceleration is speeding up </li></ul><ul><li>Slowing down is called Deceleration or Negative Acceleration </li></ul>
6. 6. Constant Acceleration = <ul><li>A steady change in velocity </li></ul><ul><li>The velocity changes by the same amount each second </li></ul>
7. 7. Positive Acceleration Graph <ul><li>Increase at a constant rate = straight line </li></ul><ul><li>Slope of line = acceleration </li></ul>
8. 8. Negative Acceleration Graph <ul><li>Decrease at a constant rate = straight line sloping downward </li></ul><ul><li>Slope is negative (Down) </li></ul>speed Time
9. 9. Distance-Time Graph <ul><li>Nonlinear graph </li></ul><ul><li>Curve connects the data points that are plotted </li></ul>distance time
10. 10. Constant High Speed time distance
11. 11. Constant Low Speed distance time
12. 12. Varying Speed distance time Not Moving