Question

A circular curve of a highway is designed for traffic moving at 72 km/h. If the radius of the curved path is 100m, the correct angle of banking of the road should be given by :
A. `tan^(-1).(2)/(5)`
B. `tan^(-1).(3)/(5)`
C. `tan^(-1).(4)/(5)`
D. `tan^(-1).(1)/(4)`

Answer 1

Correct Answer - B
`(dv)/(dt)=a_(t)=gsintheta=g sin 30^(@)=5m//s^(2)`