Question

With what maximum speed a car be safely driven along a curve of radius 40 m on a horizontal road.
if the coefficient of friction between the car tyres and road surface is 0.3 g -9.8 ms²​

Answer 1

Explanation:

$we \: know \: that \\ v = \sqrt{ \gamma rg} \\ where \gamma is \: coeff \: of \: friction \\ r \: is \: radius \\ and \: g \: is \: acc \: due \: to \: gravity$

$v = \sqrt{0.3 \times 40 \times 9.8} \\ = \sqrt{12 \times 9.8} \\ \sqrt{117.6 } \\ = approx.11ans$

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