Describe a car’s velocity as it goes around a track at a
constant speed.

If the car is going at a constant speed then the velocity isn't changing, only the direction of velocity.

emerging idea only occurs as a raw idea that could appear out of nowhere. meanwhile, to reach scientific consensus , that idea must be structured and tested over and over again through various experiments. the scientific consensus transforms the raw idea into idea that is more reliable through the process of scientific elimination.