A race car traveling at 100 m/s enters an unbanked turn of 400 m radius. The coe

Question

A race car traveling at 100 m/s enters an unbanked turn of 400 m radius. The coefficient of (static) friction between the tires and the track is 1.1. The track has both an inner and an outer wall. Which statement is correct? a. The race car will crash into the outer wall. b. The race car will crash into the inner wall. c. The car will stay in the center of the track. d. The car will stay in the center of the track if the driver speeds up. e. The car would stay in the center of the track if the radius were reduced to 200 m.

Explanation / Answer

The race car will crash into the outer wall

max fr = sN = 1.1 mg = 11 m
mv2/R = m(100)2/(400) = 25 m > fr

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