Problem 2. The block on the inclined plane is on the verge of moving down the 24° incline. Calculate the coefficient of static friction. 24⁰

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The upper leg muscle (quadriceps) exerts a force of FQ = 1180 N, which is carried by a tendon over the kneecap (the patella) at the angles shown in the figure below. 55° 75° Find the magnitude in newtons and direction in degrees counter-clockwise from an axis directed to the left of the force exerted by the kneecap on the upper leg bone (the femur). magnitude direction N ° counter-clockwise from an axis directed to the left

Two boxes are stacked as shown in the diagram below. The bottom box has a mass of 3.5 kg and the top box has amass of 1.5 kg. They are pushed up a ramp inclined at 15° by an applied force of 25 N, applied to the lower boxand directed parallel to the ramp. The coefficient of kinetic friction between the ramp and the bottom box is 0.12.Determine the minimum coefficient of static friction required to keep the top box in place on the bottom box.