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A sphere rolls without slipping on an incline of inclination θ. The minimum coefficient of static friction to support pure rolling is to be

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By Expert Faculty of Sri Chaitanya
a
2/3 Tanθ
b
2/5 Tanθ
c
2/7 Tanθ
d
3/7 Tanθ

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detailed solution

Correct option is C

Minimum Coefficient of static friction is given by 

μ=tanθ1+R2K2=tanθ1+52=27tanθ


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