Eli5: in a high pressure water cutting macchine, how does the water jet not cut part of the machine under the object that is being cut?
In: 81
The area underneath is a tank full of water. Even in air the jet quickly spreads out, but in a tank full of water it dissipates even faster.
The object to be cut is supported by thin but tall metal beams. These beams are made of metal, so already somewhat difficult to cut, but their size and shape makes it likely that the water stream will just go past them into the tank for most of the cut time.
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