The maximum speed that can be achieved without skidding by a car on a circular unbanked road of radius R and coefficient of kinetic friction μ is

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μRg

Rgμ

μ(Rg)

μRg

answer is D.

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Detailed Solution

Centripetal force = force of friction∴ mv2R=μR′R′= reaction of ground Here R′=mgHence mv2R=μmg v=(μRg)

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