You can balance a seesaw when the torques are balanced in equilibrium â that is, when the sum of the torques is zero and the torques on one side of the fulcrum are equal and opposite to the torques on the other side. For this activity the force is just the weight of the mass given by w = mg.
Likewise, as elevation increases, there is less overlying atmospheric mass, so that atmospheric pressure decreases with increasing elevation.he boiling point is the temperature at which the vapor pressure is equal to the atmospheric pressure around the water. Because of this, the boiling point of water is lower at lower pressure and higher at higher pressure.
Introduction to Pressure in Fluid Mechanics. 1  Pressure always acts inward normal to any surface (even imaginary surfaces as in a control volume). 2  Pressure is a normal stress, and hence has dimensions of force per unit area, or {ML-1T-2}. 3  Standard atmospheric pressure is 101.3 kPa (0.1013 MPa) or 14.69 psi.