Pascal's Principle

$P_{\text{in}}=P_{\text{out}}$

• The pressure going into a closed system is equal to the pressure exerted on another part of the closed system
• i.e. pressure is constant throughout the closed system
• Used to solve hydraulics problems

$F_{\text{out}}=\frac{A_{\text{out}}}{A_{\text{in}}}{F}_{\text{in}}$

• Expanded form used for hydraulics