An unbanked curve has a radius of 60m. T...

An unbanked curve has a radius of 60m. The maximum speed at which a car can make a turn if the coefficient of static friction is `0.75` , is

`2.1 m//s`

`14 m//s`

`21 m//s`

`7 m//s`

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Verified by Experts

The correct Answer is:

`v_("max")=sqrt mu rg=sqrt(0.75xx60xx9.8)=21 m//s`

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