Two vehicles driven at different speeds parallel to one another is a great one dimensional way to introduce relative motion. When viewed from above using a quadcopter drone, it is even better! Thanks Aaron Fown of [url="http://www.firstuav.co"]FirstUAV[/url] for providing the wonderful, non-terrestrial viewpoint.
0:35 Visualizing the example
1:31 Understanding the subscripts
2:46 Visualizing the Velocity of the minivan with respect to the Prius
3:33 Solving for the Velocity of the minivan with respect to the Prius
5:05 Negative vectors in relative motion
6:11 Understanding when a subscript drops out of the equation
7:05 Solving for the Velocity of the Prius with respect to the minivan
8:17 Review / visualizing multiple velocities
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