Two blocks ' \(A\) ' and ' \(B\) ' each of mass ' \(m\) ' are placed on a smooth horizontal surf....

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Two blocks ' \(A\) ' and ' \(B\) ' each of mass ' \(m\) ' are placed on a smooth horizontal surface. Two horizontal forces \(F\) and \(2 F\) are applied on the two blocks ' \(A\) ' and ' \(B\) ' respectively as shown in figure. The block \(A\) does not slide on block \(B\). Then the normal reaction acting between the two blocks is:
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