1. The problem statement, all variables and given/known data An automobile moves at constant speed over a hill with a radius of 18 m. At the top of the hill, the drivers notices that she barely remains in contact with the seat. find the speed of the vehicle. 2. Relevant equations Using newton's second lay, and centripetal force formula 3. The attempt at a solution N=0 W-N = Fc <centripetal force> therefoce, (mv^2)/r = mg and v= (rg)^0.5 I do not have the answer, so wondering if I have made any mistake somewhere above ?