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Sophia Learning
Sophia: Average Velocity & Sign Notation: Lesson 1
This lesson explains how average velocity can be represented by a positive or negative sign. It is 1 of 2 in the series titled "Average Velocity & Sign Notation." [6:44]
Khan Academy
Khan Academy: Displacement, Velocity and Time: Solving for Time
A simple example of solving for time given the distance and rate. [9:34]