4.2 Newton’s First Law of Motion: Inertia - OpenStax
https://openstax.org/books/college-physics-2e/pages/4-2-newtons-first-law-of-motion-inertia
WebNewton’s first law is often called the law of inertia. As we know from experience, some objects have more inertia than others. It is obviously more difficult to change the motion of a large boulder than that of a basketball, for example. The inertia of an object is measured by its mass. Roughly speaking, mass is a measure of the amount of ...
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