An undamped pring ma ytem ha a ma of 10 kg and a pring tiffne of 2250 N/m. It i excited by a harmonic force having a ine function characteritic with amplitude of 200 N and an excitation frequency of 15 rad/. The initial diplacement and the velocity are 0. 15 m and 1. 5 m/ repectively. The Particular olution at t = 2
Anwer 1
Chooe. The frequency ratio i:
