An 18-lb block A slides in a vertical frictionless slot
Chapter 19, Problem 19.105(choose chapter or problem)
An 18-lb block A Problems slides in a vertical frictionless slot and is connected to a moving support B by means of a spring AB of constant k = 10 lb/in. Knowing that the displacement of the support is \(d=d_{m} \sin \mathrm{V}_{f} t\), where \(d_{m} = 6 \ in\)., determine the range of values of \(v_{f}\) for which the amplitude of the fluctuating force exerted by the spring on the block is less than 30 lb.
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