A body of mass 26 gm. is placed on a horizontal rough plane, the body becomes about to begin motion under the effect of two horizontal forces of magnitudes 7 and 8 gm.wt. including an angle of measure 60°, find the measure of the angle of friction between the body and the plane.
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Answer:
Given: a body of mass 10 kg is on a rough inclined plane having an inclination of 30o with the horizontal. If coefficient of friction between the surfaces of contact of the body and the plane is 0.5
To find the least force required to pull the body up the plane.
Solution:
From figure,
The net force required
F−f=mgsinθ⟹F=mgsinθ+f⟹F=mgsinθ+μmgcosθ⟹F=10×10×sin30∘+21×10×10×cos30∘⟹F=91.4N
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