Question

A horizontal right angle pipe bend has cross section area$10c{m}^2$ and water flows through it at speed $=20m/s.$ The force on the pipe bend diue to the turing of water is$:$

• A. $565.7N$
• B. $400N$
• C. $20N$
• D. none of these

Answer 1

The correct option is A $565.7N$

Mass flowing per sec through pipe is $=$ density$\times$area $\times$velocity

change in velocity $V\times 2^{\frac{1}{2}}$

$force$ $=$ $\left(density\times area\times velocity\right)\times \left(velocity\times 2^{\frac{1}{2}}\right)$

$=565.7N$

Hence,

option $\left(A\right)$ is correct answer.