Three blocks are initially placed as shown in the figure. Block \(A\) has mass \(m\) and initial....

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Three blocks are initially placed as shown in the figure. Block \(A\) has mass \(m\) and initial velocity \(V\) to the right. Block \(B\) with mass \(m\) and block \(C\) with mass \(4 m\) are both initially at rest. Neglect friction. All collisions are elastic. The final velocity of block \(A\) is
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