1. The problem statement, all variables and given/known data Forgive me as I am trying the recall this question by memory. A racecar track is a perfect circle and 3000m long (I took this to be the distance travelled by cars, so the circumference) and after a day of time trials it is determined that the fastest possible time of completing one lap is 12 sec. What is the angle of the banking of the track? 2. Relevant equations Vmax=(r*g*tan(theta))^.5 3. The attempt at a solution First I found Vmax by dividing the 3000meters by 2 sec to get 250 m/s. Found r as 4712.4 m by dividing th circumference by 2pi. That makes the above equation 250=(4712.4*9.81*tantheta)^.5. Solve for theta=53.5 degrees.