Question: The 5 - lb collar is released from rest at A and slides down along the smooth rod as shown in ( Figure 1 )

The 5-lb collar is released from rest at A and slides down along the
smooth rod as shown in (Figure 1).
If the attached spring has a stiffness 5lbft, determine its unstretched length so that it does not allow the collar to leave contact with the top surface of the rod until =60.
Express your answer in feet to three significant figures.
l0=
ft
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The 5 - lb collar is released from rest at A and

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