50 N PROBLEM 8.122 A cable is placed around three parallel pipes. Knowing that the coefficients of friction are μs = 0.25 and μk = 0.20, determine (a) the smallest weight W for which equilibrium is maintained, (b) the largest weight W that can be raised if pipe B is slowly rotated counterclockwise while pipes A and C remain fixed. W
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- 3. (a) A 15 kg rod AB of length 2.5 m and a uniform cross section, is held in equilibrium as shown in the following figure, with one end against a vertical wall and the other attached to a cord AC. Knowing that the coefficient of friction between the rod and the wall are ug = 0.37 and Hg = 0.23, determine the range of values of the length L of the cord for which equilibrium is maintained. 1.5 m B -2.5 m-W = 10 N B W=10 N PROBLEM 8.36 Two 10-N 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 = 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.The axle of the pulley is frozen and cannot rotate with respect to the block. Knowing that the coefficient of static friction between cable ABCD and the pulley varies between 0.0 and 0.55, determine (a) the corresponding values of 0 for the system to remain in equilibrium, (b) the corresponding reactions at A and D, and (c) plot 8 versus the coefficient of friction. 60P B E 0 WD 60° 200 N
- 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.As shown, a man is leaning against the side of a cabinet with an unusual design. The cabinet's main body weighs 25 kg, while the upper rectangular portion weighs 3 kg. Assume the coefficients of friction between the cabinet and the floor are μs = 0.33 and μk = 0.28. Knowing that the force P exerted by the man's shoulder on the horizontal cabinet: 2. Determine which of the following is the CORRECT equilibrium equation obtained from the system's force diagram. A. ΣF = 0: N - 245.25 = 0B. ΣF = 0: P - μ N = 0C. ΣM = 0: 245.25(0.55) + 29.43(0.2) - N(x) - P(1.5) = 0Knowing that the coefficient of static friction is 0.30 between the rope and the horizontal pipe and that the smallest value of P for which equilibrium is maintained is 80 N, determine (a) the largest value of P for which equilibrium is maintained, (b) the coefficient of static friction between the rope and the vertical pipe.
- 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 of weight W. Knowing that P =1.260W and that the coefficient of static friction between the blocks and the horizontal surface is 0.30, determine the range of values of θ,between 0 and 180°, 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.
- A 6.5-m ladder AB leans against a wall as shown. Assuming that the coefficient of static friction μs is the same at A and B, determine the smallest value of μs for which 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.Question: An 18-kg mass is hung from a lever which rests againsta 10 degree wedge at A and is supported by a frictionless pin at C.Knowing that the coefficient of static friction is 0.25 at bothsurfacees of the wedge and that for the position shown the springis stretched 100 mm, determine (a) the magnitude of the force P forwhich motion of An 18-kg mass is hung from a lever which rests againsta 10 degree wedge at A and is supported by a frictionless pin at C.Knowing that the coefficient of static friction is 0.25 at bothsurfacees of the wedge and that for the position shown the springis stretched 100 mm, determine (a) the magnitude of the force P forwhich motion of the wedge is impending, (b) the components of thecorresponding reaction at C.