4" 4" 12 6" 4 7" A T 30 lb
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- Calculate the reaction at D for the structure described in Prob. 5.11.The homogeneous 240-lb bar is supported by a rough horizontal surface at A, a smooth vertical surface at B, and the cable BC. Draw the FBD of the bar and count the unknowns.Draw the FBDs for the beam ABC and the segments AB and BC. Note that the two segments are joined by a pin at B. Count the total number of unknowns and the total number of independent equilibrium equations.
- The 350-lb homogeneous plate has the shape of an isosceles triangle. The plate is supported by a thrust hinge at A, a slider hinge at B, and the cable CD. Find the force in the cable and the magnitudes of the hinge reactions.The cable is loaded by an 80-lb vertical force at C and a horizonal force P at B. Determine P.Find the stable equilibrium position of the system described in Prob. 10.56 if m = 2.06 kg.