A single frictionless roller-coaster car of mass m = 825 kg tops the first hill with speed vo = 12.0 m/s at height 41.0 m. First hill- B h/2 (a) What is the speed of the car at point A? m/s (b) What is the speed of the car at point B? m/s (c) What is the speed of the car at point C? m/s (d) How high will it go on the last hill, which is too high to cross? (e) If we substitute a second car with twice the mass, what is the speed of this car at point A? m/s What is the speed of this car at point B? m/s What is the speed of this car at point C? m/s How high will it go on the last hill?

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