Question

A fire hydrant delivers water of density ρ at a volume rate l. The water travels vertically upwards through the hydrant and then does 90⁰ turn to emerge horizontally at speed υ. The pipe and nozzle have uniform cross-section throughout. The force exerted by water on the corner of the hydrant is

• A. Zero
• B. $\rho vl$
• C. $2\rho vl$
• D. $\sqrt{2}\rho vl$

Answer 1

The correct option is D

$\sqrt{2}\rho vl$