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

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

Laws of Motion

Solution:

$v_{max}=\sqrt{\mu rg}$
$=\sqrt{0.75\times60\times9.8}$
$=21\, m/s$