Additional Problems (Problem 85)

Two boxes, A and B, are at rest. Box A is on level ground, while box B rests on an inclined plane tilted at angle $\theta$ with the horizontal. (a) Write expressions for the normal force acting on each block. (b) Compare the two forces; that is, tell which one is larger or whether they are equal in magnitude. (c) If the angle of incline is $10^{\circ }$, which force is greater? Select the answer to part (c).