Many times physics students are asked to solve problems involving objects at rest or moving on inclined planes. May they be blocks or rolling objects standing still, falling down, or climbing up the incline, geometry and trigonometry play an important role in getting the right solution to the particular problem at hand. In the simplest static problem, a block is seen at rest on a plane inclined at an angle θ with respect to the horizontal as in Fig. 1(a). By Newtonian friction, the block is at rest as long as

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Readers can view the appendices at TPT Online, http://dx.doi.org/10.1119/10.0006121, under the Supplemental tab.

Supplementary Material

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