# NEWTON'S LAWS (FORCES)

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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1. One post is enough.
The "following figure" is missing.

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posted by drwls
2. Mass of a is 6.7
Mass of b is 2.2

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3. yut

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posted by hg

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