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(a) Torsional amplitude of vibration is given by:
	theta=To/sqrt((Kt-Jw2)^2+(Ct*w^2)^2)

	theta=0.3334 rad

(b) Maximum damping couple= Ct*w*theta = 0.5334 N-m

(c)Phase angle phi =
	tan(phi)=(Ct*w)/(Kt-J*w^2)
phi=117.248 degrees