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

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Strength of Materials
Limiting force of friction is the

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 limiting friction
Ratio of limiting friction and normal reaction
the friction force acting when the body is in motion

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