Why we choose to use Remote Displacement (Force) in lieu of Fixed Support and Force?
Deflection Formula
It is obvious to use force at the end point and fixed support on the fixed end when using hand calculation of deflection on beam structure, but why should we use remote displacement and remote force?
Let’s say we have a compression force exerted at the free-end of the beam (see below image), the beam would deform as the dash line shown.