Extracted text: Show that response of an undamped SDOF System subjected to a harmonic excitation p(t) = po sin wt, w # wn is given by 1. P. 1 - sin @„t и() sin ot # ®, k 1-(@l @,) 2. Show that the expression for damping in terms of two frequencies wa and wn is given by the equation Wb – Wa 2wn