Strength of Materials
The center of gravity of a triangle lies at the point of

Intersection of bisector of angles
Intersection of its altitudes
Concurrence of the medians
Intersection of diagonals

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Strength of Materials
The weight of a body is due to

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

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Strength of Materials
Kinetic friction is the

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

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