1. The problem statement, all variables and given/known data A roller-coaster vehicle has a mass of 510 kg when fully loaded with passengers (Fig. P7.28). http://www.webassign.net/sf/p7_28.gif (b) What is the maximum speed the vehicle can have at point B in order for gravity to hold it on the track? 2. Relevant equations F-centripetal = mv^2/R A-centripetal = V^2/R 3. The attempt at a solution I tried doing mv^2/R = mv^2/R (there was a velocity given in another part of the problem) but that didn't work.