Newton’s Laws of Motion. From inertia to acceleration, and action–reaction symmetry — the architecture of classical mechanics begins here. These three laws form the analytical backbone of dynamics: • First Law → Equilibrium & inertia • Second Law → Quantitative force analysis (F = ma) • Third Law → Interaction forces & system mechanics Every moving vehicle, launching rocket, athletic stride, and engineered structure obeys these principles without exception. Master the laws. Master the motion. Ma