a = v^2/r where v = 2 pi r/14.3
F = m a = 640 a
A 640-kg racing car completes one lap in 14.3 s around a circular track with a radius of 45.0 m. The car moves at constant speed.
(a) What is the acceleration of the car?
m/s2
(b) What force must the track exert on the tires to produce this acceleration?
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