A rope ABCD is looped over two pipes as shown. Knowing that the coefficient of static friction is 0.25, determine (a) the smallest value of mass 'm' for which equilibrium is possible, (b) the corresponding tension in portion BC of the rope. в 27° A D 50 kg m E
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- The spring attached to the homogenous bar of weight W is undeformed when =0. Determine the smallest spring stiffness k for which the =0 equilibrium position will be stable. Use W = 10 lb, a = 24 in., and b = 6 in. Assume that the spring remains horizontal, which is a valid approximation if is small.Two identical chairs, each weighing 14 lb, are stacked as shown. The center of gravity of each chair is denoted by G. The coefficient of static friction is 0.2 at B (the contact point between the chairs) and 0.35 at A, C, and D. Determine the smallest force P that would cause sliding.Determine the largest force P for which the 16-kg uniform bar remains in equilibrium.
- Find the largest value of b/h at which the folding table is in equilibrium. The coefficients of static friction are 0.5 at A and 0.3 at C. Neglect the weight of the table.A 120kg block is supported by a rope which is wrapped 1 1/2 times around a horizontal rod. knowing that the coefficient of static friction between the rope and the rod is 0.15, determine the range of values of P for equilibrium is maintained.The 50-lb plate ABCD is attached at A and D to collars that can slide on the vertical rod. Knowing that the coefficient of static friction is 0.40 between both collars and the rod, determine whether the plate is in equilibrium in the position shown when the magnitude of the vertical force applied at E is (a) P=0, (b)=20 Ib.
- A hot-metal ladle and its contents weigh 130 kips. Knowing that the coefficient of static friction between the hooks and the pinion is 0.30, determine the tension in cable AB required to start tipping the ladle.Knowing that the coefficient of static friction is 0.25 between the rope and the horizontal pipe and 0.20 between the rope and the vertical pipe, determine the range of values of P for which equilibrium is maintained.Two slender rods of negligible weight are pin-connected at C and attached to blocks A and B , each with a weight W . Knowing that P = 1.260 W and that the coefficient of static friction between the blocks and the horizontal surface is 0.30, determine the range of values of 0 between 0 and 180° for which equilibrium is maintained.
- Two 10-lb blocks A and B are connected by a slender rod of negligible weight. The coefficient of static friction is 0.30 between all surfaces of contact, and the rod forms an angle θ=30° with the vertical. (a)Show that the system is in equilibrium when P= 0. (b) Determine the largest value of P for which equilibrium is maintained.Two identical uniform boards, each with a weight of 40 lb, are temporarily leaned against each other as shown. Knowing that the coefficient of static friction between all surfaces is 0.40, determine (a) the largest magnitude of the force P for which equilibrium will be maintained, (b) the surface at which motion will impend.The frame shown is composed of members ABCDEF (collar at F), GFHIJ (collar at G), DKI, CLMG, ME, KH and pulley A. Determine the forces experienced by ❤ members ME and KH. The horizontal forces acting in H and I with respect to member GFHIJ are equal in magnitude but opposite in direction. The pulley is frictionless and has a diameter of 1 meter. P = 135 kN d = 11 m j = 4 m