A particle of mass 2 kg moves with an initial velocity of $\overline{\mathrm{v}}=4\hat{\mathrm{i}}+4\hat{\mathrm{j}}{\mathrm{ms}}^{-1}$. A constant force of $\overrightarrow{\mathrm{F}}=-20\hat{\mathrm{j}}\mathrm{N}$ is applied on the particle. Initially, the particle was at 0, 0 The x-coordinate of the particle when its y-coordinate again becomes zero is given by