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How can an equilibirum question be simplified?
BY identifying 2 and 3 force members
What is a 2 force member?
A member in which there are forces only acting at 2 point on the member
What can be said about equilibrium of 2 force members
A 2 force member is in equilibrium if the 2 forces acting on the member are equal in magnitude but oppositely directed but also lie on the same line of action
How is a 3 force member defined
If a member has forces acting on it in 3 different points
What can be said about equilibrium of 3 force members
A 3 force member is in moment equilibrium if the forces form a triangle or act parallel to one another