The maximum speed of a car on a road–turn of radius 30 m, if the coefficient of friction between the tyres and the road is 0.4, will be

10.84 m/sec

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9.84 m/sec

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8.84 m/sec

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6.84 m/sec

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Solution

The correct option is A
10.84 m/sec

$v = \sqrt{μ r g} = \sqrt{0.4 \times 30 \times 9.8} = 10.84 m / s$

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