Question

If the velocity head of a stream of water is equal to $10\text{cm}$, then its speed of flow is approximately

• A. $1.2\text{m/s}$
• B. $1.4\text{m/s}$
• C. $1.7\text{m/s}$
• D. $1.8\text{m/s}$

Answer 1

The correct option is B $1.4\text{m/s}$

Given,
Velocity head, $h=10\text{cm}=0.1\text{m}$
We know that velocity head $h$ is given by, $h=\frac{v^2}{2g}$


$\Rightarrow v=\sqrt{2gh}$
$=\sqrt{2\times 10\times 0.1}$
$=\sqrt{2}\text{m/s}=1.4\text{m/s}$