A car with a mass of 1130 kg is traveling in a mountainous area with a constant

Question

A car with a mass of 1130 kg is traveling in a mountainous area with a constant speed of 69.4 km/h. The road is horizontal and flat at point A, horizontal and curved at points B and C. The radii of curvatures at B and C are: rB = 160 m and rC = 120 m

a)Calculate the normal force exerted by the road on the car at point A = 1.11?104

I need help with these 2 parts..

b)Now calculate the normal force exerted by the road on the car at point B.

c)And finally calculate the normal force exerted by the road on the car at point C.

Explanation / Answer

m = 1130; g = 9.81

v = 69.4*5/18 [m/s]

rb = 160; rc = 120

b) m*g = N + (m*v*v/rb)

N = 8461 N

c) m*g + (m*v*v/rc) = N

N = 14585 N

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