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In the arrangement shown in figure, m(A)...

In the arrangement shown in figure, `m_(A) = 1 kg` and `m_(B) = 2 kg`, while all the pulleys and strings are massless and frictionless. At `t = 0`, a force `F = 10 t` starts acting over central pulley in vertically upward direction. If the velocity of A is `x xx 10 m//s` when B loses contact with floor, find x.

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