Using the method of sections, determine the forces in members BG, CI, and CD.
Using the method of sections, determine the forces in
members BG, CI, and CD. Express your answers in terms of P (e.g.FA= 0.5P)
3.1 Use the concepts of moment and force equilibrium, find the reactions at
point A (FAx and FAy) and point E (FEy).
3.2 Find FBG first. Cut through BC, BG, and GF, consider the Left-Hand Side
(LHS) section as a whole, find FBG by considering the Free-Body Diagram
(FBD), and equilibrium of forces in the y-direction.
3.3 Now find FCI and FCD. Cut through CD, CI, and HI, consider the RHS
section as a whole, find FCI by considering the FBD, and equilibrium of
forces in the y-direction. Then, find FCD by taking moment at point I, and
consider the concept of moment equilibrium.
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