  We have given theoretical expressions for the forces exerted on a quasi-2D
flat and smooth solid plate immersed into a liquid pool of a simple liquid. All
forces given by the theory, the local forces on the top, the contact line and
the bottom of the plate as well as the total force, showed an excellent
agreement with the MD simulation results. We also revealed that the local
forces around the bottom and top of the solid plate can be related to the SL
and SV interfacial tensions \gamma_{SL} and \gamma_{SV}, and this was verified
through the comparison with the SL and SV works of adhesion obtained by the
thermodynamic integration. We have reached a conclusion that \gamma_{SL} and
\gamma_{SV} as well as the liquid-vapor interfacial tension \gamma_{LV} can be
extracted from a single equilibrium MD simulation without the
computationally-demanding calculations.
