Friction-More than one option correct problem

JEE Mains 2015 Coaching › Mechanics questions › Friction-More than one option correct problem

Let F,F_Nand f denote the magnitudes of the contact force,normal force and the friction exerted by one surface on the other kept in contact.If none of these is zero,
(a)F>F_N (b)F>f (c)F_N>f (d)F_N-f<F<F_N+f

#Physics #Mechanics

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Aditya Bhutra ·2012-07-14 10:30:56

draw FBD , F_N and f are perpendicular to each other . and their vector sum is the net contact force F .

thus F² = F_N² +f² +2.F_N.f

hence a) b) d) are correct.

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Anik Chatterjee ·2012-07-15 09:31:19

ya got it....thanx

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Friction-More than one option correct problem

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