In Fig. 15-53, three 18000 kg ore cars are held at rest on amine railway using a cable that is parallel to the rails, which areinclined at angle θ = 34°. The cable stretches 21 cm justbefore the coupling between the two lower cars breaks, detaching the lowest car. Assuming that the cable obeys Hooke's law, find the(a) frequency (in Hz) and (b)amplitude of the resulting oscillations of the remaining two cars