(14%) Problem 6: Consider a bar, of length 45 111, shown in the gure, is constrained to locate E3 about its left end. In addition to the force exerted at the left end responsible for this constraint, three forces are acting on the bar that generate torques. The magnitudes of the rst two forces are 28 N and 32 N, and the rst force is acting on the end of the bar at an angle of 41 as shown. & 33% Part (a) What is the torque, in newton-meters, due to F1 on this bar relative to the left end? Use a coordinate system with positive directed out of the screen. E & 33% Part (b) What is the torque, in newton-meters, clue to F 2 on this bar relative to the left end, if this force is acting at the midpoint of the bar? Use a coordinate system with positive directed out of the screen. D A 33 % Part (c) What is the magnitude of the force F 3, in newtons, if the force is a distance 0.65 m from the left end and the bar is not rotating? (14%) Problem 7: The triceps muscle in the back of the upper arm is primarily used to extend the forearm. Suppose this muscle in a professional boxer exerts a force of 225 x 103 N with an effective perpendicular lever arm of 2.95 cm, producing an angular acceleration of the forearm of 120 rad/s2. D & What is the moment of inertia of the forearm, in kilogram meters squared