A 1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. The spring has an undeformed length of 5 in. and a constant k =10 lb/ft. Knowing that the collar is released from being held at A determine the speed of the collar C A 5 in. and the normal force between the collar and the rod as the collar 7 in. passes through B. |B

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