A mass - spring system is subjected to q single external torce r ost s 6M secands , and then in terms of Heaviside Sin(t) tAis function f(t) wriften given by? which arts for ノ s suppressed ノ a) sen(t) (1+ U(t – 67)) b) sen(t) (1 – U(t – 67)) c) sen(t) - U (t – 6x) d) –sen(t) - U (t – 6m)

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