To elaborate, if you know the exact location of a particle with perfect accuracy, does this mean that the momentum of it still exists but we just don't know what it is/ can't measure it? Or does this mean that the particle at this point literally does not have momentum at all (while having perfec...

In his answer to the question Can the coefficient of static friction be less than that of kinetic friction? Chad Orzel says: As an aside, the static/kinetic coefficient model is actually pretty lousy. It works as a way to set up problems forcing students to deal with the vector nature of forces,...