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

reaction at a point or an axis, fixed in space, around which a body is con-strained to turn
All of the listed here
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

ANSWER DOWNLOAD EXAMIANS APP

Strength of Materials
Kinetic friction is the

The friction force acting when the body is in motion
Ratio of limiting friction and normal reaction
The friction force acting when the body is just about to move
Tangent of angle between normal reaction and the resultant of normal reaction and the limiting friction

ANSWER DOWNLOAD EXAMIANS APP

Strength of Materials
A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will

remain horizontal
unpredictable
slant up towards direction of pull
slant down towards direction of pull

ANSWER DOWNLOAD EXAMIANS APP