Motion In A Straight Line

The position of a particle is given by

\(\vec{r}(t)=4 t \hat{i}+2 t^2 \hat{j}+5 \hat{k}\)

where \(\mathrm{t}\) is in seconds and \(\mathrm{r}\) in metre. Find the magnitude and direction of velocity \(v(t)\), at \(t=1 \mathrm{~s}\), with respect to \(\mathrm{x}\)-axis