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In the figure, the pulley `P` moves to the right with a constant speed of `4 m//s`. The
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In the figure, the pulley `P` moves to the right with a constant speed of `4 m//s`. The downward speed of `A` is `v_(A) = 3 m//s`. Then find the speed of `B` of the right (in `m//s`).
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