Solve y + y = 1 - t 2 / 2 ? if 0 < t <
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Solve y" + y = 1 - t2/π2?if 0<t<π and 0 if t ?? ??; here, y(0) = 0, y' (0) = 0. This models an undamped system on which a force F acts during some interval of time (see Fig. 59), for instance, the force on a gun barrel when a shell is fired, the barrel being braked by heavy springs (and then damped by a dashpot, which we disregard for simplicity).
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m = 1 k = 1 F F =1-t/n2 1 F=0 Fig. 59. Problem 24
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If 0 t then a particular solution gives y p 2k 2 and thus Hence a general solution is From ...View the full answer
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