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At certain of time velocities of 1 and 2...

At certain of time velocities of `1` and `2` both are `1m//s` upwards. Find the velocity of `3` at that moment

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In above solution ,we have found that
`a_(2) + a_(3) + 2a_(1) = 0`
Similarly, we can find
`V_(2) + V_(3) + 2V_(1) = 0`
Taking upward direction as positive we are given
`V_(1) = V_(2) = 1m//s`
` :.V_(3) = - 3 m//s`
i.e. velocity of block `3 is 3m //s` (downwards)
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