Strength of Materials
The possible loading in various members of framed structures are

compression or tension
buckling or shear
All of the listed here
shear or tension

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Strength of Materials
According to Lami's theorem

If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
Three forces acting at a point will be in equilibrium
Three forces acting at a point can be represented by a triangle, each side being proportional to force

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Strength of Materials
In the equation of virtual work, following force is neglected

reaction of a rough surface of a body which rolls on it without slipping
All of the listed here
reaction of any smooth surface with which the body is in contact
reaction at a point or an axis, fixed in space, around which a body is con-strained to turn

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