Learning Goal: To be able to solve three-dimensional equilibrium problems using the equations of equilibrium. Part A As with two-dimensional problems, a free-body diagram is the first step in solving three-dimensional equilibrium problems. For the free- body diagram, it is important to identify the appropriate reaction forces and couple moments that act in three dimensions. At a support, a force arises when translation of the attached member is restricted and The J-shaped member shown in the figure(Figure 1) is supported by a cable DE and a single journal bearing with a square shaft at A. Determine the reaction forces Ay and A, at support A required to keep the system in equilibrium. The cylinder has a weight WB = 6.00 lb. and F = 1.80 lb is a vertical force applied to the member at C. The dimensions of the member are w = 1.50 ft. 1= 6.00 ft , and h = 2.00 ft Express your answers numerically in pounds to three significant figures separated by a comma. a couple moment arises when rotation is prevented.For a rigid body to be in equilibrium when subjected to a force system, both the resultant force and the resultant couple moment acting on the body must be zero. These two conditions are expressed as • View Available Hint(s) EF = 0 Ay. Ag = 0.000,7.80 lb EMo = 0 where F is the sum of all external forces acting on the body and EMo is the sum of the couple moments and the moments of all the forces about any point O. Submit Previous Answers Correct These two equations are equivalent to six scalar equilibrium equations that can be used to find up to six unknowns identified in a free-body diagram. These equations require that the sum of the external force components in the x, y, and z directions must be zero and the sum the moment components about the x, y, and z axes are also zero. Important: If you use this answer in later parts, use the full unrounded value in your calculations. Part B Now, for the same J-shaped member, determine MA MA, and MA, the couple moments at the support about the x, y, and z axes, respectively, required to keep the system in equilibrium. The cylinder weighs WB = 6.00 lb; a vertical force F = 1.80 lb acts at C; and the member's dimensions are w = 1.50 ft , 1 = 6.00 ft , and h = 2.00 ft. Express your answers numerically in pound-feet to three significant figures separated by commas. Figure < 1 of 1> • View Available Hint(s) VO AEo It vec ? MA, MA, MA, = Ib ft D Submit Provide Feedback Next >