Problem Fa m1 m2 30 Two crates stacked on top of each other are to be pulled up an incline whose angle is 0 = 30 above the horizontal. The force pulling the bottom box is parallel to the incline pulling the boxes at a constant speed. The masses of the boxes are m1 = 28 kg and m2 = 42 kg. If the coefficient of kinetic friction between the ramp and lower box is /k = 0.5 and the coefficient of static friction between the boxes is /s = 0.90, then by how much force does the box need to be pulled without falling apart? (a.) [6 points] Set up a free body diagram for both boxes. (b.) [5 points] Set up the equations with respect to the incline. (c.) [4 points] Solve for the force. Hint: Solution is 510.92 N