4.2 Newton's First Law of Motion: Inertia - Physics - OpenStax
https://openstax.org/books/physics/pages/4-2-newtons-first-law-of-motion-inertia
WEBInertia is the tendency for an object at rest to remain at rest, or for a moving object to remain in motion in a straight line with constant speed. This key property of objects was first described by Galileo. Later, Newton incorporated the concept of inertia into his first law, which is often referred to as the law of inertia.
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