1. Diagrams and Motion Graphs

2.  The slope is equal to the acceleration.  Because we only consider constant acceleration, v/t graphs will always be straight lines. Velocity vs. time graphs

3.  Positive velocity indicates the object is moving away from the reference point  The x axis means v=0  Green is slower, getting closer to zero.  Purple is speeding up, moving farther from the x axis.

4.  Negative velocity indicates the object is moving toward the reference point.  Purple line – the negative Velocity “is increasing” at a faster rate.  Green line – the negative velocity “is decreasing” relative to the reference point. Velocity vs. time graphs

5. Velocity vs. time graphs (Acceleration)  When the slope is zero:  horizontal line  velocity is constant  acceleration is zero

6. Velocity vs. time graphs  When the slope of the graph is positive:  the acceleration is positive

7. Velocity vs. time graphs  When the slope of the graph is negative:  the acceleration is negative

8.  We cannot determine where an object’s position from a v/t graph, only its change in position. Velocity vs. time graphs