1. The problem statement, all variables and given/known data A 919 kg rollercoaster is about to go up a hill that acts as the top of a circle 16.21m in diameter. What is the fastest that car can move (in m/s) without leaving a track? known: mass: 919 kg diameter: 16.21 radius: 8.105 2. Relevant equations Vt=r[tex]\omega[/tex] [tex]\omega[/tex]=[tex]\theta[/tex]/time 3. The attempt at a solution i have no idea how to work this out with out knowing the time or speed or somekind of time measurement. Is there another way to solve this?