Fluid Mechanics




Pressure = Density x g x depth ( where g is the acceleration due to gravity = 9.81m/s²)

Cross sectional area of round cylnder or tank A = πd²/4


In pneumatic and hydraulic systems - i.e. cylinders connected by pipes.
Effort Area x Effort distance moved = Load Area x Load distance moved

The forces are in the ratio of the squares of the diameters. F1 = F2 x d1²/d2²