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March 30, 2015

Homework Help: NEWTON'S LAWS (FORCES)

Posted by Mar on Saturday, October 8, 2011 at 8:48pm.

Two boxes, A and B, are connected to each end of a light vertical rope, as shown in the following figure. A constant upward force 78.0N is applied to box A . Starting from rest, box B descends 12.3 m in 3.80s . The tension in the rope connecting the two boxes is 30.0 N
What is the mass of box B?

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