Wait, is the car in the northern or southern hemisphere, and at what latitude? Is it travelling with or against the earth rotation? Are we ignoring the effects of charged ions? Is the car’s headlining vinyl, velour, or something else. Do we know the coefficient of friction of the headlining? Is the vehicle on level ground? During braking, what attitude does the vehicle take due to weight transfer? Is the driver wearing a nylon jumper? Has anyone in the car eaten beans or radishes within the past 24 hrs?
Just polishing off my excel sheet, nearly there.