# [SCI] Newtonian Mechanics
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**Newtonian Mechanics** is the body of physical law formulated by Isaac Newton (1687) describing motion and gravitation. It is the root of virtually all classical physics and engineering.
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## Overview
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Newton's three laws of motion and the universal law of gravitation provided the first complete, quantitative, predictive framework for the physical world. Any mass exerts a gravitational force on every other mass; forces cause accelerations proportional to mass (F = ma); every action has an equal and opposite reaction. These principles underpin celestial mechanics, fluid dynamics, thermodynamics, and electromagnetism as limiting cases.
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Newton also invented calculus (simultaneously with Leibniz) as the mathematical language required to express these laws, giving science a tool that proved essential for all subsequent quantitative work.
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## Key Figures & Recognition
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- **Isaac Newton** (1643–1727): *Principia Mathematica* (1687). Fellow of the Royal Society; Lucasian Professor of Mathematics, Cambridge. Predates Nobel Prize.
- **Gottfried Leibniz** (1646–1716): Co-inventor of calculus; rival formalism.
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## Seminal Papers / Books
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- Newton, I. *Philosophiæ Naturalis Principia Mathematica*. 1687.
- Euler, L. "Mechanica sive motus scientia analytice exposita." 1736.
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## Historical Notes
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Newton's framework dominated physics for over two centuries. Its failures — in electromagnetism at high speeds, at atomic scales, and in strong gravitational fields — each motivated a successor theory (special relativity, quantum mechanics, general relativity). Yet Newtonian mechanics remains the working approximation for virtually all engineering applications.
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## Topics in This Graph
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This graph traces two interleaved lineages from Newtonian mechanics:
- **[SCI] nodes** (blue): scientific discoveries and theories
- **[TECH] nodes** (orange): technologies and engineering systems
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Edges represent causal or enabling relationships. Non-alternating connections (SCI→SCI or TECH→TECH) occur where the historical record demands it.
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# Parents
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* Private root ⏎