If a cyclist moving with a speed of `4.9 m//s` on a level road can take a sharp circular turn of radius 4 m , then coefficient of friction between the cycle tyres and road is

Options

A. 0.41
B. 0.51
C. 0.61
D. 0.71

Answer

C

Explanation

`v_("max") = sqrt(mu rg)`
`rArr mu = v^(2)/(rg) = (4.9)^(2)/(4 xx 9.8) = 0.61`