Strength of Materials
The weight of a body is due to

force of attraction experienced by par-ticles
gravitational force of attraction towards the centre of the earth.
centripetal force of earth
gravitational pull exerted by the earth

ANSWER DOWNLOAD EXAMIANS APP

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 a rough surface of a body which rolls on it without slipping
reaction of any smooth surface with which the body is in contact

ANSWER DOWNLOAD EXAMIANS APP