EBK ENGINEERING MECHANICS
15th Edition
ISBN: 9780137616909
Author: HIBBELER
Publisher: VST
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Chapter 11, Problem 39P
To determine
The weight of the block
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A spring with a torsional stiffness k is attached to the hinge at B. It is unstretched when the rod assembly is in the vertical position. Determine the weight W of the block that results in neutral equilibrium. Hint: Establish thepotential energy function for a small angle θ, i.e., approximate sin θ ≈ 0, and cos θ ≈ 1 - θ2/2.
Determine the unstretched length of spring AC if a force P = 100 Ib causes the angle 0= 52° for equilibrium. Cord AB
is 2 ft long. Take k = 35 lb/ft.
2 ft
2 ft
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Q2/ Determine the unstretched length of spring AC if a force P 80lb causes
the angle 0 = 60° for equilibrium. Cord AB is 2 ft long. Take k = 50 lb/ft.
Chapter 11 Solutions
EBK ENGINEERING MECHANICS
Ch. 11 - Determine the required magnitude of force P to...Ch. 11 - Determine the magnitude of force P required to...Ch. 11 - The linkage is subjected to a force P = 2 kN....Ch. 11 - Prob. 4FPCh. 11 - Determine the angle where the 50-kg bar is in...Ch. 11 - Prob. 6FPCh. 11 - The scissors jack supports a load P. Determine the...Ch. 11 - When = 20, the 50-lb uniform block compresses the...Ch. 11 - Prob. 8PCh. 11 - The thin rod of weight W rests against the smooth...
Ch. 11 - If each of the three links of the mechanism have a...Ch. 11 - Prob. 18PCh. 11 - The Nuremberg scissors is subjected to a...Ch. 11 - The potential energy of a one-degree-of-freedom...Ch. 11 - Prob. 27PCh. 11 - Prob. 28PCh. 11 - Prob. 29PCh. 11 - Prob. 30PCh. 11 - Prob. 31PCh. 11 - Prob. 32PCh. 11 - The uniform bar has a mass of 80 Kg. Determine the...Ch. 11 - Prob. 39PCh. 11 - The uniform rod has a mass of 100 kg. If the...Ch. 11 - Prob. 42PCh. 11 - The buck has a mass of 20 Mg and a mass center at...Ch. 11 - Prob. 45PCh. 11 - Prob. 1RPCh. 11 - Prob. 2RPCh. 11 - Prob. 4RPCh. 11 - Prob. 5RPCh. 11 - The uniform bar AB weighs 100 lb. If both spring...Ch. 11 - The spring attached to the mechanism has an...
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- Q4 / Determine the unstretched length (Lo) of spring Ac if a force P= 400 N causes the Ø=60° for equilibrium cord AB is 0.6m long . Take K=850 N/m. As shown in fig (4)? 0.6 m 0.6 m wwwarrow_forwardWhat the tension developed in cable AB required for equilibrium of the 600-lb crate. If the tension in cable AC=-120 i+120j+60 K and in cable AD=D360 i 2'n -2 Select one: 180 360 lb None of these 720 lbarrow_forward1m 3.5m 2.75m 3m →Y 2m Dx m Dy m D (Dx,Dy,0) 50N The bucket at (x.y,z) = (2.2, 2.9,0) is supported by 3 slender bars as shown and is in equilibrium. You can assume the three bars behave as two-force members. Find the magnitude of the force in the bar DB. NEarrow_forward
- Cable AB passes over the small ideal pulley C without a change in its tension. What length of cable CD is required for static equilibrium in the position shown? What is the tension Tin cable CD? T A 46° D 3.6' Answers: i Tco= i B 60 lb ft lbarrow_forwardDetermine the unstretched length of spring AC if a force P = 801b causes the angle 8 = 60 ° for equilibrium. Cord AB is 2 ft long. Take k = 50 lb / ft.arrow_forwardThe 10 Ib weight is supported by the cord AC, a roller and by a spring. If the spring has an unstretched length of 8 in. and the weight is in equilibrium when d = 4 in., determine the stiffness k of the spring. 12 in. in A Select one: O a.k= 4.8 lb/in Ob.k=7.8 Ib/in Oc.k=6.8 Ib/in Od.k=5.8 Ib/inarrow_forward
- ka block is held in equilibrium by the system of springs. Draw a free-body diagram for the ring at A. -3 m kAC = 20 N/m 3 m kAB = 30 N/m kAD = 40 N/m Darrow_forwardThe 437-kg uniform beam is subjected to the three external loads shown. Compute the vertical reaction (N) at the support point O if P = 4135 N, Q = 3230 N, T = 40672 Nm, x = 1.01 m, y = 1.33 m, and z = 1.58 m and the system is in equilibrium.Positive values are to the right, up, and counterclockwise. Round off only on the final answer expressed in 3 decimal places.arrow_forwardThe rod supports a cylinder of mass m = 80 kg and is pinned at its end A. If it is also subjected to a couple moment of M = 500 N-m, determine the angle for the system to be in equilibrium in degrees. The spring has an unstretched length of 1 m and a stiffness of k = 600 N/m. L₁ and L₂ are 1.6 m and 1.4 m, respectively. Your Answer: Answer M 1 m L1 m L2 k Barrow_forward
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