The book A having a weight of 1.5 lb slides on the smooth horizontal slot. If the block is drawn back so that s = 0. Each of the two springs has a stiffness of k = 150 lb/ft and an unstretched length of 0.5 ft.

The book A having a weight of 1.5 lb slides on the smooth horizontal

1.	The book A having a weight of 1.5 lb slides on the smooth horizontal slot. If the block is drawn back so that s = 0. Each of the two springs has a stiffness of k = 150 lb/ft and an unstretched length of 0.5 ft.
A.	vA = 106.2 ft/s
B.	vA = 120.4 ft/s
C.	vA = 160.5 ft/s
D.	vA = 107.7 ft/s
Answer» B. vA = 120.4 ft/s

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The book A having a weight of 1.5 lb slides on the smooth horizontal slot. If the block is drawn back so that s = 0. Each of the two springs has a stiffness of k = 150 lb/ft and an unstretched length of 0.5 ft.

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