Statics 83-1 Theorem of translation of a force Theorem of translation of a force: A force acting on a rigid body can be moved parallel to its lines of action to any point of the body, if we add a couple with a moment equal to the moment of the force about the point to which it is translated. Proof F→ orce system F, FF"→oreF+ force system(F,F) F FF F=P≌F m=Fd 77 §3-1 Theorem of translation of a force Theorem of translation of a force: A force acting on a rigid body can be moved parallel to its lines of action to any point of the body, if we add a couple with a moment equal to the moment of the force about the point to which it is translated. [proof] F force system force force system F,F ,F F+ （F，F）