Question

A car is moving on a circular level road of curvature `300m` . If the coefficient of friction is `0.3` and acceleration due to gravity is `10m//s^(2)` , the maximum speed of the car be
A. `90Km//h`
B. `81Km//h`
C. `108Km//h`
D. `162Km//h`

Answer 1

Correct Answer - C
`(mv^(2))/(R)=mumg`
`:. V=sqrt(muRg)=sqrt(0.3xx300xxx10)`
`=30m//s=108Km//h`