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Concept Card: Unit 3 (Laws of Motion) Comprehensive Mastery Cheat Sheet 1. Fundamental Laws & Momentum Dynamics: Newton’s First Law: $\sum \vec{F}_{\text{ext}} = \vec{0} \iff \vec{a} = \vec{0} \iff \vec{v} = \text{constant}$. Establishes mass $m$ as the quantitative measure of translational inertia and defines inertial frames of reference. Newton’s Second Law: $\vec{F}_{\text{net}} = \frac{d\vec{p}}{dt} = … Read more