This physics video tutorial explains how to draw free body diagrams for different situations particular those that involve constant velocity and constant acceleration. It explains when to uses forces such as tension, static and kinetic friction, gravity / weight force, and the normal force. Examples include hanging masses, inclined planes, and so much more.
Full 1 Hour 35 Minute Video:
https://www.youtube.com/watch?v=d1uEEjfs2iY
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1.30 GEEK