The Lagrangian equation of motion for a system of spring and a mass m connected by a pulley(disk) of radius a as shown in the figure is given by: (a) ë- 28 , 2g , 2ke = 0 За Зт (b) ӧ+ За 2g , 2ko = 0 3m (с) ө— За 2g , ke = 0 2g, ko (d) ô + За m 0 =
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