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Problem 1 (10 points) Block A, with weight 3w, slides down an inclined plane S of slope angle 36.9 at a constant speed while plank B, with weight w, rests on top of A. The plank is attached by a cord to the wall as shown below. (a) Draw a free body diagram for block A. (b) Draw a free body diagram for plank B. (c) If the coefficient of kinetic friction is the same between A and B and between S and A determine its value k 6.9 Problem 2 (10 points) A wedge of inclined angle a and mass M rests on frictionless, horizontal tabletop. A block with mass m is placed on the wedge and a horizontal force F is applied to the wedge as seen in the figure below. What must the magnitude of F be if the block is to remain at a constant height above the tabletop? Express your answer only in terms of M, m, a, and g. where g 9.80 m/s. Ignore the friction between the wedge m and the block m.
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Podlom fo C) No For bleckA zero ton. 369。 W

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