Strength of Materials
The product of either force of couple with the arm of the couple is called

moment of the forces
moment of the couple
resultant couple
resulting couple

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Strength of Materials
Kinetic friction is the

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

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

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