Prolem with Newton's law?

[batthanvy2003]

A highway curve has a radius of 0.58km and is unbanked. A car weighing 36kN goes around the curve at aspeed of 36km/h without slipping. what is the magnitude of the horizontal force of the road on car ?
This is an Circular motion with Newton's law

 

[Leut. Dan Taylor]

Centripetal Force
F=mv^2 / r

mass of the car = 36kN / g = 36kN/9.81m/s^2 = 3669.27kg
36 km/hr = 10m/s
F = 3669.27kg * (10m/s)^2 / 580m = 632.63 N