A civil engineer is asked to design a curved section of roadway that meets the f

Question

A civil engineer is asked to design a curved
section of roadway that meets the following
conditions:
With ice on the road, when the coefficient of
static friction between the road and rubber is
0.13, a car at rest must not slide into the ditch
and a car traveling less than 70 km/h must
not skid to the outside of the curve.
The acceleration of gravity is 9.81 m/s2 .

At what angle should the road be banked?
Answer in units of degrees. Got this part already 7.4069
What is the minimum radius of curvature of
the curve?
Answer in units of m

Explanation / Answer

static friction between road and rubber is =0.13

___________________________________________________________________________________________

the required angle =tan^-1()

                             =tan^-1(0.13)

                            =7.40690

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