Acceleration is defined as a change in an object's speed or direction over a period of time, which can be calculated using the formula acceleration = change in velocity / time. Acceleration is measured in meters per second squared (m/s^2). Slowing down is also a type of acceleration called deceleration or negative acceleration. Constant acceleration refers to a steady change in velocity where the velocity changes by the same amount each second.

1. Acceleration 11.3 Acceleration 11-3

2. Acceleration = A change in speed ( Velocity ) or direction in an amount of time Speed 2 - Speed1 / t V2 – V1 / t

3. Acceleration Units = m / s 2 Units = meters / second /second

4. Change in speed Formula Change in speed = Final Speed – Initial Speed Change in speed = 10 m/sec - 4 m/sec Change in speed = 6 m/sec

5. Slow down—is accelerating Acceleration is speeding up Slowing down is called Deceleration or Negative Acceleration

6. Constant Acceleration = A steady change in velocity The velocity changes by the same amount each second

7. Positive Acceleration Graph Increase at a constant rate = straight line Slope of line = acceleration

8. Negative Acceleration Graph Decrease at a constant rate = straight line sloping downward Slope is negative (Down) speed Time

9. Distance-Time Graph Nonlinear graph Curve connects the data points that are plotted distance time

10. Constant High Speed time distance

11. Constant Low Speed distance time

12. Varying Speed distance time Not Moving