If a particle starting from rest is moving with a uniform acceleration of ${\text{10ms}}^{-\text{2}}$, then the final velocity when it covers a distance of 2 km is    

$\text{u}=0$                                       

$\text{a}=1{\text{0m/s}}^{\text{2}}$                              

$\text{v}=?$                                       

$\text{s}=2\text{km}=2\text{000m}$                   

 ${\text{v}}^2-{\text{u}}^{\text{2}}=2\text{as}$

${\text{v}}^2-0^2=2\times 10\times 2000$

$\text{v}=2\text{00 m/s}$

$\text{v}=\frac{200}{1000}\text{km/s}$

$\text{v}=0.2{\text{kms}}^{\text{-1}}$