Question: The 2-lb collar is released from rest at A and slides down along the smooth rod. If the attached spring has a stiffness k =

The 2-lb collar is released from rest at A and slides down along the smooth rod. If the attached spring has a stiffness k = 2 lb/ft, determine its unstretched length so that it does not allow the collar to leave contact with the top surface of the rod until θ = 60°. 2 ft A k=2 lb/ft ww

2 ft A k=2 lb/ft ww

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