A collar of mass m which slides on a frictionless horizontal rod is attached to a spring o...

A collar of mass m which slides on a frictionless horizontal rod is attached to a spring of constant k and is acted upon by a periodic force of magnitude P = Pm sin wft. Determine the range of values of wf for which the amplitude of the vibration exceeds two times the static deflection caused by a constant force of magnitude Pm.

Fig. P19.102