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OpenStudy (anonymous):
Two boxes,A and B and , are connected to each end of a light vertical rope, as shown in the following figure. A constant upward force 78.0 N is applied to box B. Starting from rest, box descends 11.1 m in 5.00 s . The tension in the rope connecting the two boxes is 37.0 N. What's the mass of A? boxes are like: A / B please help!
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