Questions
A box of mass 8 kg is placed on a rough inclined plane of inclination . Its downward motion can be prevented by applying an upward pull F and it can be made to slide upwards by applying a force 2 F. The coefficient of friction between the box and the inclined plane is
detailed solution
Correct option is A
During downward motion:F = mg sinθ− mg cosθDuring upward motion:2F = mg sinθ+μmg cosθSolving above two equations, we get μ =(tanθ)/3Talk to our academic expert!
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A body of mass 5 X 10-3 kg is launched upon a rough inclined plane making an angle of 30° with the horizontal. Obtain the coefficient of friction between the body and the plane, if the time of ascent is half of the time of descent.
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