1. Graphing motion

2. Position time graphs
Show how the object changes its position over time.
Slope indicates velocity (rise/run = change in position/change in time)
Horizontal Line = Stopped! (no matter at which position)
Up is + (moving away from zero point)
Down is negative. (moving toward the zero point)
Steeper lines are faster
Peaks are a change in direction
the "y" intercept equals the initial displacement.
when two curves coincide, the two objects have the same displacement at that time.

3. Position time graphs Constant Velocity (straight line)
Positive Velocity
positive slope implies motion in the positive direction.
Positive Velocity
Changing Velocity (acceleration) (curved line)
an object undergoing constant acceleration traces a portion of a parabola.

4. Leftward (-) Velocity Fast to Slow Negative (-) Velocity;
negative slope implies motion in the negative direction
Slow to Fast
Accelerating in the opposite direction (curved down)
Leftward (-) Velocity
Fast to Slow
                                                
                                                   

5. Velocity time graphs Slope indicates acceleration
Straight line is constant acceleration
Curved is changing acceleration.
Horizontal line not at zero means a constant velocity
Horizontal line at zero means a zero velocity (stopped)
Positive is above the x-axis (watch direction)
Negative is below the x-axis
Crossing the x axis is a change in direction
Area under the curve is the displacement (height = Δvelocity, base = Δtime, Δvelocity *Δtime = displacement)
the "y" intercept equals the initial velocity.
when two curves coincide, the two objects have the same velocity at that time.

6. Acceleration time graphs
slope is meaningless.
the "y" intercept equals the initial acceleration.
when two curves coincide, the two objects have the same acceleration at that time.
an object undergoing constant acceleration traces a horizontal line.
zero slope implies motion with constant acceleration.
the area under the curve equals the change in velocity.