Question

A 2-kg disk is constrained horizontally but is free to move vertically. A vertical jet of water strikes from below the disk. The speed and diameter of the water jet are 10m/s and 25mm at the nozzle exit. Obtain a general expression for the speed of the water jet as a function of height, h. Find the height to which the disk will rise and remain stationary. Please Help me with this question!!! Thanks for your help!!! A 2-kg disk is constrained horizontally but is free to move vertically. A vertical jet of water strikes from below the disk. The speed and diameter of the water jet are 10m/s and 25mm at the nozzle exit. Obtain a general expression for the speed of the water jet as a function of height, h. Find the height to which the disk will rise and remain stationary. Please Help me with this question!!! Thanks for your help!!! @Physics

Answer 1

Remember:

\[P=\frac{F}{A}\]
so, maybe try some Bernoulli’s:
\[P=-\frac{\rho v^2}{2}-\rho g \Delta h\]
And to get the stationary point, \[F=mg\]
try equating this...