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In the figure, the pulley P moves to the...

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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The correct Answer is:
7

`overset(*)(X_(1)) + overset(*)(X_(2)) = 0`
`rArr (4 - V_(B)) + 3 = 0 rArr V_(B) = 7 m//s`
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