Concept explainers
Find three values of
Answer to Problem 10.80P
The value of
The equilibrium is
The equilibrium is
The equilibrium is
Explanation of Solution
Given information:
The weight of the slender rod AB is
The length of the slender rod AB is
The spring constant is
Calculation:
The spring is unstretched when AB is horizontal.
Show the free-body diagram of the arrangement as in Figure 1.
Find the elongation of the spring s using the relation.
Here, the length of the slender rod AB is l.
Find the potential energy (V) using the relation;
Differentiate the equation;
Here, the weight of the slender rod AB and the spring constant is k.
Differentiate the Equation (1).
Equate the Equation (1) to zero for equilibrium.
Substitute 300 lb for W,
Solve the equation by trial and error procedure.
Therefore, the value of
For
Substitute 300 lb for W,
Therefore, the equilibrium is
For
Substitute 300 lb for W,
Therefore, the equilibrium is
For
Substitute 300 lb for W,
Therefore, the equilibrium is
Want to see more full solutions like this?
Chapter 10 Solutions
Vector Mechanics for Engineers: Statics and Dynamics
- A collar B with a weight of W can move freely along the vertical rod shown. The constant of the spring is k , and the spring is unstretched when 0 = 0. (a) Derive an equation in 0, w, k, and 1 that must be satisfied when the collar is in equilibrium. (b) Knowing that W = 300 N, 1 = 500 mm, and k = 800 N/m, determine the value of 0 corresponding to equilibrium.arrow_forwardThe two-bar linkage shown is supported by a pin and bracket at B and a collar at D that slides freely on a vertical rod. Determine the force P required to maintain the equilibrium of the linkage.arrow_forwardCollars A and B are connected by a 25-in.-long wire and can slide freely on frictionless rods. Determine the distances x and z for which the equilibrium of the system is maintained when P=120 lb and Q=60 lb.arrow_forward
- A spring AB of constant k is attached to two identical gears as shown. Knowing that the spring is undeformed when 0= 0, determine two values of the angle 0 corresponding to equilibrium when P= 30 lb, a= 4 in., b= 3 in., r= 6 in., and k= 5 lb/in. State in each case whether the equilibrium is stable, unstable, or neutral.arrow_forwardDetermine the value of θ corresponding to the equilibrium position of the rod of Prob. 10.12 when P = 80 N, and Q= 100 N.Reference to Problem 10.12:Knowing that the line of action of the force Q passes through point C , derive an expression for the magnitude of Q required to maintain equilibrium.arrow_forwardSolve Prob. 10.12 assuming that the force P applied at point A acts horizontally to the left.Reference to Problem 10.12:Knowing that the line of action of the force Q passes through point C , derive an expression for the magnitude of Q required to maintain equilibrium.arrow_forward
- B8arrow_forwardDetermine the value of θ corresponding to the equilibrium position of the rod of Prob. 10.10 when I= 30 in., a= 5 in., P = 25 lb, and Q= 40 lb.Reference to Problem 10.10:The slender rod AB is attached to a collar A and rests on a small wheel at C . Neglecting the radius of the wheel and the effect of friction, derive an expression for the magnitude of the force Q required to maintain the equilibrium of the rod.arrow_forwardP A P C HINT: Collar A is in equilibrium 20.5 20 4+₂5 50 lb Free Body: Collar A 150 lb A 20 in. PROBLEM 2.63 Collar A is connected as shown to a 50-lb load and can slide on a frictionless horizontal rod. Determine the magnitude of the force P required to maintain the equilibrium of the collar when (a) x=4.5 in., (b) x=15 in. Where does N come from? What is it?arrow_forward
- A slender rod AB with a weight W is attached to two blocks A and B that can move freely in the guides shown. Knowing that the spring is unstretched when y = 0, determine the value of y corresponding to equilibrium when W = 80 N, I= 500 mm, and k= 600 N/m.arrow_forwardA vertical load P is applied at end B of rod BC. The constant of the spring is k, and the spring is unstretched when θ = 60°. (a) Neglecting the weight of the rod, express the angle θ corresponding to the equilibrium position in terms of P, k, and l. (b) Determine the value of θ corresponding to equilibrium if P= 1/4kl.arrow_forwardAnswers FFG= 1103.7267 W = 832.7498 Mc= 6272.9979 Cy= 1297.7498 Cx=0arrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY