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

2.1 m/s

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14 m/s

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21 m/s

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7 m/s

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Solution

The correct option is C 21 m/s
$v_{m a x} = \sqrt{μ r g} = \sqrt{0.75 \times 60 \times 9.8} = 21 m / s$

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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

The correct option is C 21 m/svmax=√μrg=√0.75×60×9.8=21m/s

The correct option is C 21 m/s
$v_{m a x} = \sqrt{μ r g} = \sqrt{0.75 \times 60 \times 9.8} = 21 m / s$