Strength of Materials
Dynamic friction as compared to static friction is

more
less
same
may be less of more depending on nature of surfaces and velocity

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

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

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