A car travels at a speed of 60 km/h on a level road on which there is an unbanked turn of radius 50 cm . For which of the following values of coefficient of friction between the tyres and the road surface will the car normal skid while turning ?

Options

A. `0.76`m/s
B. `0.84`m/s
C. `1.2`m/s
D. `2.4` m/s

Answer

D

Explanation

`v = (60 xx1000)/(60 xx 60) = 16.66 , r = 50" m , "mu mg = (mv^(2))/r " , "mu = (v^(2))/(rg) = ((16.66)^(2))/(50 xx 9.8) = 0.6` .