Strength of Materials
A single force and a couple acting in the same plane upon a rigid body

cannot balance each other
are equivalent
balance each other
produce moment of a couple

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

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

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