Bernoulli’s Principle seems to say that increased flow velocity causes less pressure. This does make sense, since pressure takes energy and so does motion, so with a fixed amount of energy of course there’s a tradeoff. But in every example I can think of, the opposite seems to be true. If you put your thumb over a hose nozzle, the water goes faster and there’s also increased pressure on your thumb. The higher you turn the water flow, the faster the water flows and the stiffer the hose becomes. What am I missing?
In: Physics
The pressure increases downstream of your thumb, and the velocity decreases. Less water flows out of the hose.
But as the water passes the restriction, your thumb, the pressure drops and the velocity increases.
You can only feel the pressure increase, because you don’t feel the water after it leaves.
Latest Answers