17-62. The 10-lb bar is pinned at its center O and
Chapter 18, Problem 17-62(choose chapter or problem)
17-62. The 10-lb bar is pinned at its center O and connected to a torsional spring. The spring has a stiffness k = 5 lb ft/rad, so that the torque developed is M = (50) lb ft. where 0 is in radians. If the bar is released from rest when it is vertical at 0 = 90, determine its angular velocity at the instant 0 = 0.
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