Question

At what speed will the velocity head of stream of water be equal to 40cm?

• A. 280 ms${}^{-1}$
• B. 2.80 cm/s
• C. 280 cms${}^{-1}$
• D. 0.280 m/s

Answer 1

Answer: (C)

280 cms${}^{-1}$

Velocity head $=\frac{V^2}{2g}=40cm$
$\Rightarrow V^2=40\times 980\times 2$
$\Rightarrow V=280cm/s$