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Q.

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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a

μRg

b

Rgμ

c

μ(Rg)

d

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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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