The two blocks are released from rest and the $38-lb$ block $B$ moves $2ft$ up the incline. The coefficient of kinetic friction between both blocks and the inclined planes is ${}_k=0\mathrm{.}10.$

$($Figure $1)$

Part A

Determine the velocity of the $70-$lb block $A.$

Express your answer to three significant figures and include the appropriate units.

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