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friction (Question)

nnaas said – Fri, 23 Oct 2009 17:40:28 -0000 ( Link )

an insect crawls in an hemispherical surface very slowly the coefficient of friction between the surface and insect is 1/3.if the line joining the center of the hemi spherical surface to the insect makes an angle with the verticle the max.possible value of the angle is?

ans: cot(angle)=3

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  1. varsha karandikar said – Sat, 24 Oct 2009 15:56:51 -0000 ( Link )

    draw fbd of insect and solve it

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  2. somsaxena said – Thu, 29 Oct 2009 16:18:21 -0000 ( Link )

    normal from point where the insect is points towards centre of hemisphere. draw diagram.take required angle=a at the location of insect, draw below it an inclined plane with base angle =a aplly newtons laws find a

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