A particle, of mass 10^–3. kg and charge 1.0 C, is initially at rest. At time t = 0, the particle comes under the influence of an electric field $\overrightarrow{\mathrm{E}}\left(\mathrm{t}\right)={\mathrm{E}}_0\mathrm{sin\omega t}\hat{\mathrm{i}},$where E₀ = 1.0 N C^–1 and ω = 10³ rad s^–1. Consider the effect of only the electrical force on the particle. Then the maximum speed, in m s^–1, attained by the particle at subsequent times is ___________.