Strength of Materials
Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction

at an angle equal to the angle of friction to the inclined plane
vertically
along the plane
horizontally

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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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