With collar A held in position, a static horizontal force of 3 lb applied to the sphere...

With collar A held in position, a static horizontal force of 3 lb applied to the sphere B gives it a deflection of 0.60 in. against the elastic resistance of the slender rod of negligible mass to which it is attached. If the collar A is given a horizontal harmonic oscillation with a frequency of 2 cycles per second and an amplitude of 0.30 in., calculate the amplitude X of the horizontal vibration of the sphere. Assume negligible damping.