Strength of Materials
Frictional force encountered after commencement of motion is called

dynamic friction
post friction
frictional resistance
limiting friction

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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 angle of repose is equal to angle of friction
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

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