An 8-kg block A slides in a vertical frictionless slot and is connected to a moving support B by… 1 answer below »

An 8-kg block A slides in a vertical frictionless slot and is connected to a moving support B by means of a spring AB of constant k = 1.6 kN/m. Knowing that the displacement of the support is  , determine the range of values of ωf for which the amplitude of the fluctuating force exerted by the spring on the block is less than 120 N.