[28] Power transmission
If a force F_1 is applied
to an area A_1 of a liquid, a pressure p results. If, as in this
case, the pressure acts on a larger surface A_2, then a larger
counter-force F_2 must be maintained. If A_2 is three times as
large as A1, then F_2 will also be three times as large as
F_1.
Hydraulic power transmission is comparable to the mechanical law of levers.