There is a uniform electric field of strength $10^3\; V\;m^{-1}$ along $y$-axis. A body of mass $1\; g$ and charge $10^{-6}C$ is projected into the field from origin along the positive $X$-axis with a velocity $10\; ms^{-1}$. Its speed in $ms^{-1}$ after $10\; sec$ is :<br> (Neglect gravitation)
