Physics Pressure Chapter 6
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FlashcardsPressure
Pressure is the force acting per unit area
Hydraulic principle/Pascal's law
If a pressure is applied to an enclosed liquid, the pressure is transmitted to all other parts of the liquid undiminished.
Fx/Ax=Fy/Ay
Work done same (F x D)
Volume of water displaced same (Surface area x distance moved)
Oil ✅ lubricates, does not evaporate easily, doesn't cause corrosion
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4 Terms
Pressure
Pressure is the force acting per unit area
Hydraulic principle/Pascal's law
If a pressure is applied to an enclosed liquid, the pressure is transmitted to all other parts of the liquid undiminished.
Fx/Ax=Fy/Ay
Work done same (F x D)
Volume of water displaced same (Surface area x distance moved)
Oil ✅ lubricates, does not evaporate easily, doesn't cause corrosion
Density
Mass per unit area
Density of water = 1000kg/M3
Density of mercury = 13600kg/M3
g/cm3 x 1000 = kg/m3
Liquid pressure
P = h x rho x g
Same depth, same pressure, regardless of volume
If net upthrust is larger than weight, than float (converse applies)
Refer to notes