A vehicle of mass m is driven along an un-banked curved path of radius of curvature r with a speed v. If μ is necessary minimum coefficient of friction between tyres of vehicle and road so that the vehicle does not skid, then:
μ∝1v2
μ∝r
μ∝v2
μ∝1r
A
μ∝1r
B
μ∝1v2
C
μ∝r
D
μ∝v2
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Solution
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For not skidding, μN=mv2r or, μ=v2rg
So, μ∝v2 when r is constant
and μ∝1r when v is constant.
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