Strength of Materials
The weight of a body is due to

centripetal force of earth
force of attraction experienced by par-ticles
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
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
The friction force acting when the body is in motion

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Strength of Materials
Which one of the following statements is not correct

the sine of the angle of repose is equal to coefficient to friction
the tangent of the angle of repose is equal to coefficient of friction
the angle of repose is equal to angle of friction
the tangent of the angle of friction is equal to coefficient of friction

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