The 2-lb block A slides in the smooth horizontal slot. When s = 0 the block is given an...

The 2-lb block A slides in the smooth horizontal slot. When s = 0 the block is given an initial velocity of 60 ft/s to the right. Determine the maximum horizontal displacement s of the block. Each of the two springs has a stiffness of k = 150 lb/ft and an unstretched length of 0.5 ft.