Strength of Materials
Two coplanar couples having equal and opposite moments

Balance each other
Are equivalent
Produce a couple and an unbalanced force
Produce a moment of couple

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

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

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