The 9-lb collar is released from rest at A and travels along the frictionless guide. (Figure 1) Part A Determine the speed of the collar when it strikes the stop B. The spring has an unstretched length of 0.5 ft. Express your answer to three significant figures and include the appropriate units. 미 VB = Value Submit Request Answer Figure Provide Feedback 1 of 1 1.5 ft B -k-4 lb/ft ? ft/s