We began the class by reviewing the forces we have studied in the past few weeks. Then, we labeled the various forces - gravity(G), air resistance(Air), friction(f), normal force (N), and tension (T). Next, we discussed how we can properly use these terms to label and identify forces in our force diagrams from now on. Finally, after looking at several examples we proved that friction forces are parallel to the surface an object is on, while normal forces are always perpendicular to the surface an object is on. At the end of class, we received a homework assignment regarding the forces involved in the interactions between two objects, and a review of the trigonometry involved in common physics problems.
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