Mathematics

Problem

For the motion described by

s(t)=\sqrt{5+2t^{4}}

metres, what is the velocity of the particle at

t=1\,\text{s}

? a)

\displaystyle \frac{8}{\sqrt{7}}\;\text{m s}^{-1}

\displaystyle \frac{2}{\sqrt{7}}\;\text{m s}^{-1}

\displaystyle \frac{4}{\sqrt{7}}\;\text{m s}^{-1}

\displaystyle \frac{4}{7}\;\text{m s}^{-1}