2 ms·
Category error created via multiple mathematical and physics misconceptions. - A decelerating car does not have negative velocity - "negative velocity" is ass
by refulgentis 2y ago
Category error created via multiple mathematical and physics misconceptions.
- A decelerating car does not have negative velocity
- "negative velocity" is assuredly nonphysical, which rips the middle out of an argument based on physicality
- Velocity is a vector quantity, as is acceleration. (the steelman'd version of this argument is s/velocity/acceleration)
- The negative isn't physical, it's pidgin for algebra so late middle high schoolers / early high schoolers can imitate physics without learning any of the above
- toxik 2y agoNewton’s third law? Pidgin for high schoolers. Got it.
- refulgentis 2y agoIf you express it with a negative sign and forget it represents direction, absolutely! :) It's crucially important that its not directionless! I'm a bit surprised by your assertiveness. Even if you think I'm being boorish about it (I didn't intend to be, but the downvotes say otherwise), you seem familiar enough with these things to know newton's third law is about vector quantities.
- toxik 2y agoVectors can be negated
- d0mine 2y agoThere is no one true theory of everything. All models are false -- some are useful. Many different math concepts are used successfully in physics. Even if they may be outside everyday intuition for a layman, that doesn't make them less "real"
- refulgentis 2y agoI didn't mention a theory of everything, nor did I say "the model is false". I laid out what a vector quantity is and what "-" applied to one in 1D expands to.
- d0mine 2y agoIf you want to be so literal, let's simplify: your [unqualified] "nonphysical" claim is wrong. Negative values are common in many physical models.