The collar has mass M and rests on the smooth rod. Two springs are attached to it and the ends of the rod as shown. Each spring has an uncompressed length l. If the collar is displaced a distance s = s' and released from rest, determine its velocity at the instant it returns to the point s = 0.

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Given: M = 20 kg s' = 0.5 m 1 = 1 m d = 0.25 m k = 50 N BIZ m k' = 100 N m