Question

If the banking angle of curved road is given by `tan^(-1)((3)/(5))` and the radius of curvature of the road is 6 m, then the safe driving speed should not exceed (take, `g=10ms^(-2)`)
A. `86.4"km h"^(-1)`
B. `43.2"km h"^(-1)`
C. `21.6"km h"^(-1)`
D. `30.4"km h"^(-1)`

Answer 1

Correct Answer - C
`tantheta=(v^(2))/(gr)rArr(3)/(5)=(v^(2))/(10xx6)`
`v=6ms^(-1)=21.6kmh^(-1)`