The uniform bar AB weighs 10 lb. If the attached spring is unstretched when = 90,
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The uniform bar AB weighs 10 lb. If the attached spring is unstretched when θ = 90°, use the method of virtual work and determine the angle for equilibrium. Note that the spring always remains in the vertical position due to the roller guide.
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+ k = 51b/ft 4ft 4ft Prob. R11-4 B
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