A body is thrown vertically upwards and rises to a maximum height of 10 m. The velocity with which the body is thrown upward is (acceleration due to gravity, g = 9.8 m/s²)

A body is thrown vertically upwards and rises to a height of 10 m. The velocity with which the body is thrown upward is 14 m/s.
Here, $\mathrm{h}=10 \mathrm{m}$
          $\mathrm{g}=9.8 \mathrm{m}/{\mathrm{s}}^2$
          u = initial velocity of the body
We know that, 
${\mathrm{v}}^2={\mathrm{u}}^2-2\mathrm{gh}$
At $\mathrm{h}=10 \mathrm{m}$, $\mathrm{v}=0$
Therefore, ${\mathrm{u}}^2=2\mathrm{gh}$
$\Rightarrow \mathrm{u}=\surd (2\times 9.8\times 10)$
Therefore, $\mathrm{u}=14 \mathrm{m}/\mathrm{s}$.