This discussion focuses on the pedagogical approach of teaching momentum before force, specifically examining textbooks that present momentum and then define force as F = \dot{p}. The participants express concerns about the applicability of this definition, particularly in systems with variable mass, such as rockets. They question whether this approach is beneficial despite its limitations and note that many traditional texts typically introduce force before momentum.
PREREQUISITESPhysics educators, curriculum developers, and students seeking to understand the relationship between momentum and force in classical mechanics.
Are you referring to issues like the rocket problem?madness said:Since that form of Newton's second law is only valid for constant mass systems, I would think its not a great starting point.
Do most texts introduce force first?madness said:Is there any good reason to use this definition despite the loss of generality?