Equivalent Force System

Tutorial Objective:

Practice calculating moments generated by forces about a given point.

Understand how to replace forces acting on a body with an equivalent force$-$couple system and with a

single force

Question$1$

Replace the force at A by an equivalent force and couple moment at point O $.$

Question $2$

Four people are attempting to move a stage platform across the floor. If they exert the horizontal forces

shown, determine $($a$)$ the equivalent force$-$couple system at $O$ and $($b$)$ the points on the xand y$-$axes

through which the line of action of the single resultant force R passes.