Hydrostatic force on a plane surface and curve

Siła hydrostatyczna na płaskiej powierzchni i krzywej, Fr, hcg, Ycg, hcp, Ycp

Hydrostatic force on a plane surface and curve, Fr, hcg, Ycg, hcp, Ycp. Pressure and hydrostatic force pressure = force per unit area = density * acceleration due to gravity * depth. System density of water units of Force.