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Spring CD remains in the horizontal position at all times due to the roller at D. If the spring is unstretched when theta = 0 degrees and the stiffness is k=1.5 kN/m, determine the smallest angle theta for equilibrium and the horizontal and vertical components of reaction at pin A.
The cart supports the uniform crate having mass of 85 kg. Determine the vertical reactions on the three casters at A, B, and C. The caster at B is not shown. Neglect the mass of the cart.
If the cable can be subjected to a maximum tension of 300 lb, determine the maximum force F which may be applied to the plate. Compute the x,y,z components of the reaction at the hinge A for this loading.
Member AB is supported at B by a cable and at A by a smooth fixed square rod which fits loosely through the square hole of the collar. Determine the tension in cable BC if the force F={-45 k} lb.
Use the method of joints to determine the forces in each member of the truss. Determine which members are in tension and which are in compression. Identify any zero force members. Draw the FBD s for each joint.
Use the method of sections to determine the forces in members EF, EC, and BC. Determine which of these members are in tension and which are in compression.
Determine the tensions developed in wires CD, CB, ab BA and the angle required for equilibrium of the 30 lb cylinder E and the 60 lb cylinder F. If cylinder E weighs 30 lb and theta = 15 degrees, determine the weight of cylinder F.
The picture has a weight of 10 lb and is to be hung over the smooth pin B. If a string is attached to the frame at points A and C, and the maximum force the string can support is 15 lb, determine the shortest string that can be safely used.
The towing pendant AB is subjected to the force of 50 kN exerted by a tugboat. Determine the force in each of the bridles, BC and BD, if the ship is moving forward with constant velocity.
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