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Chapter 2: Newton's Laws of Motion
1. Why This Matters
In 1687, Sir Isaac Newton published a book that changed everything. In it, he laid out three simple laws that explain why things move the way they do. These laws are so powerful that they still guide engineers, scientists, and astronauts today. They explain why you lurch forward when a bus stops suddenly, why a rocket can lift off the ground, and why it is harder to push a heavy box than a light one.
Newton's laws are the foundation of
