Sample Problem 14

The 30-kg block is supported by two springs having the stiffness shown. Determine the unstretched length of each spring after the block is removed.




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Sample Problem 13

Knowing that P=100 lb, determine the tension in cables AC and BC.











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Sample Problem 12

A Load W is supported by three cables as shown. Determine the value of W, knowing that the tension BD is 390 lb.

Sample Problem 11

Express the weight W required to maintain equilibrium in terms of P, d, & h.

Sample Problem 10

A 300 lb force is applied at point C for what values of θ is the tension in cable AC minimum? What are the corresponding values of the tension in cables AC and BC?

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Sample Problem 9

The collar A may slide freely on the horizontal smooth rod. The spring attached to the collar has a constant of 10 lb/in, and is undeformed when the collar is directly below support B. Determine the magnitude of the force P required to maintain equilibrium when c= 9 inch.





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Sample Problem 8

Two cables are tied together at C and loaded as shown. Determine the tension in AC and BC.








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Sample Problem 7

The direction of the 300 N force may vary, but the angle between the forces is always 40º. Determine the value of θ for which the resultant of the forces acting at A is directed parallel to the plane .

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Sample Problem 6

Two cables which have known tensions are attached at point B. A third cable AB is used as a guy wire and is also attached at B. Determine the required tension in AB so that the resultant of the forces exerted by the three cables will be vertical.



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Sample Problem 5

A collar which may slide on a vertical rod is subjected for the three forces shown. The direction of the force F may be varied. If possible determine the direction of the force F so that the resultant of the three forces is horizontal knowing that the magnitude of F is a) 480 lb and b) 280 lb.











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