## hydrodynamicsMotion changes the pressure within a fluid, and this can be difficult to predict accurately. The flow can be either smooth (streamlined) or turbulent, when the fluid is broken up into eddies; it is then harder to calculate the pressure at different points within the fluid. ## Hydraulic liftA hydraulic lift (see diagram) works on the principle that an incompressible liquid transmits pressure equally in all directions. The small forcef acting on area a produces pressure f/a which is converted at the much larger area A to the correspondingly larger force F so that F/A = f/a. The larger force can be used to move great weights. But the weight moves through only the small distance d. ## Related category• CLASSICAL MECHANICS | ||||||

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