1. The problem statement, all variables and given/known data 1) A 615-kg racing car completes one lap in 14.3 s around a circular track with a radius of 50.0 m. The car moves at constant speed. a) what is the acceleration of the car? b) what force must the track exert of the tires to produce this acceleration. 2. Relevant equations Ac=v^2/r Fnet=mv^2/r 3. The attempt at a solution ac=14.3^2/50.0 ac=4m/s Now im sure I did the equations right but the teacher wanted to know the direction of the acceleration I believe. Because some other kids asked him if there was any acceleration at all because it wasn't slowing down or speeding up.