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Boxes A and B are connected to each end
of a light vertical rope . A constant upward
force F = 80.0 N is applied to box A. Starting from
rest, box B descends 12.0 m in 4.00 s. The tension in
the rope connecting the two boxes is 36.0 N. What are
the masses of (a) box B, (b) box A?
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