Consider a car moving at a constant speed of 14m/s around a level circular bend of radius 45 m.The minimum coefficient of static friction needed between the car tyres and the road so that the car goes around the bend without skidding is

0.44

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0.03

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0.31

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Solution

The correct option is B 0.44
Radius of circular bend $r = 45 m$
Speed of car $v = 14 m / s$
Minimum coefficient of friction $μ = \frac{v^{2}}{r g}$
$∴$ $μ = \frac{14^{2}}{(45) (9.8)} = 0.44$

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Consider a car moving at a constant speed of 14m/s around a level circular bend of radius 45 m.The minimum coefficient of static friction needed between the car tyres and the road so that the car goes around the bend without skidding is

The correct option is B 0.44Radius of circular bend r=45 mSpeed of car v=14 m/sMinimum coefficient of friction μ=v2rg∴ μ=142(45)(9.8)=0.44

The correct option is B 0.44
Radius of circular bend $r = 45 m$
Speed of car $v = 14 m / s$
Minimum coefficient of friction $μ = \frac{v^{2}}{r g}$
$∴$ $μ = \frac{14^{2}}{(45) (9.8)} = 0.44$