Question

Speed of liquid coming out through a hole at depth $h$ below the free surface depends on

• A. Pressure at point $P$
• B. Pressure at point $O$
• C. Depth ${}^{\prime }{h}^{\prime }$
• D. All of these

Answer 1

The correct option is D All of these

Applying Bernoulli's theorem at point $P$ and $O$,
$\Rightarrow P_p+\rho gh+0=P_o+\frac{1}{2}\rho v^2+0$
where $P_p$ and $P_o$ are pressure at point $P$ and $O$ respectively.
$\therefore$ $v$ depends on $P_p,P_o$ & $h$
$\therefore$ option (D) is correct.