A block of mass \(3.0\,\text{kg}\) is hung from a spring, causing it to stretch \(12\,\text{cm}\) at equilibrium. The \(3.0\,\text{kg}\) block is then taken off and the spring returns to its original height. Now a \(4.0\,\text{kg}\) block is placed on the spring and released from rest. How far will the \(4.0\,\text{kg}\) block fall before its direction is reversed?