A collar B of weight W is attached to the spring AB and can move along the
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A collar B of weight W is attached to the spring AB and can move along the rod shown. The constant of the spring is 1.5kN/m and the spring is unstretched when en θ = 0. Knowing that the coefficient of static friction between the collar and the rod is 0.40, determine the range of values of W for which equilibrium is maintained when
(a) θ = 20°,
(b) θ = 30°.
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a 0.5 m- To wwwww B
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