R17-6. The pendulum consists of a 30-lb sphere and a 10-lb slender rod. Compute the reaction at the pin O just after the cord AB is cut. 1 ft 2 ft
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- The spring attached to the sliding collar is capable of carrying tension and compression. The spring has a stiffness k = 1.5 lb/in., and its free length is 1.5L. If the System is known to be in equilibrium in the position =30, determine the weight W of the slider.The weightless bars AB and CE, together with the 5-lb weight BE, form a parallelogram linkage. The ideal spring attached to D has a free length of 2 in. and a stiffness of 7.5 lb/in. Find the two equilibrium positions that are in the range 0/2, and determine their stability. Neglect the weight of slider F.The two bars each have a mass of 8 kg. Determine the required stiffness k of the spring so that the two bars are in equilibrium when θ = 60°. The spring has an unstretched length of 1 m. Investigate the stability of the system at theequilibrium position.
- The three A-36 steel wires each have a diameter of 2 mm and unloaded lengths of LAC = 1.60 m and LAB = LAD = 2.00 m. Determine the force in each wire after the 150-kg mass is suspended from the ring at A.The uniform bar AD has a mass of 20 kg. If the attached spring is unstretched when θ = 90°, determine the angle θ for equilibrium. Note that the spring always remains in the vertical position due to the roller guide. Investigatethe stability of the bar when it is in the equilibrium position.The unstretched length of spring AB is 3.3 m. If theblock is held in the equilibrium position shown, (a) Draw the free-body diagram of the ring A. (b) Determine the mass of the block at D.