1. Constant Acceleration Consistent change in velocity with respect to time.

3. Instantaneous vs Average Velocity Average Velocity: Change in position within a given time interval When velocity is changing, “average velocity” is less meaningful Instantaneous Velocity: The velocity at a given moment in time The slope of every point in our trendline could represent the instantaneous velocity of an object

5. Graphing Acceleration Velocity Vs. Time graphs for constant acceleration A.Always Linear B. y-intercept = starting velocity of the object C. Slope (rate of change) = acceleration of the object

6. Calculating Average Acceleration Similar to calculating average velocity – Change in Velocity – Change in Time/Time interval

7. Time Interval, change in velocity, and acceleration A. time Interval (  t) from the graph t (s) 0 1 2 345 6 7 8 v (m/s) 1 2 3 4 5 6 0 7 8

8. B. Change in velocity (  v) from the graph t (s) 0 1 2 345 6 7 8 v (m/s) 1 2 3 4 5 6 0 7 8

9. C. Acceleration - from the v vs. t graph Rate of change = rise/run =  v/  t Average acceleration (a) = change in velocity/time interval – a =  v/  t – Units: m/s/s or m/s 2 t (s) 0 1 2 345 6 7 8 v (m/s) 1 2 3 4 5 6 0 7 8