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

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

ANSWER DOWNLOAD EXAMIANS APP

Strength of Materials
According to Lami's theorem

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
If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Strength of Materials