A particle of mass m is attached to one end of a light slender rod which pivots about a horizontal axis through point O. The spring constant k = 200 N/m and the distance b = 200 mm. If the system is released from rest in the horizontal position shown where the spring is unstretched, the bar is observed to deflect a maximum of 30° clockwise. Determine (a) the particle mass m and (b) the particle speed v after a displacement of 15° from the position shown. Neglect friction.
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