Questions
A mass of 1 kg is just able to slide down the slope of an inclined rough surface when the angle of inclination is 60°. The minimum force necessary to pull the mass up the inclined plane is : (g = l0 ms-2)
detailed solution
Correct option is B
Fmin=mgsin60∘+μmgcos60∘=mgsin60∘+tan60∘mgcos60∘=2mgsin60∘=2(1)(10)32=17.32NTalk 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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