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The name "gravity" comes from the Latin word, gravitas. In the Europe of Newton's time, Latin was the language used by the learned, and many books on academic and scientific subjects were written in Latin so that they could be read by people in all the European countries regardless of the reader's own native language. English is coming to play a similar role in the world today. Gravitas simply meant "heaviness" or "weight," and heavy bodies were usually said at this time to possess the property of gravity. Their heaviness, or weight, was what made them fall down. Newton had new things to say about heaviness, and a new way of talking about it. By saying that gravity should be understood as a force that's exerted between heavy bodies that had what Newton called mass, Newton was saying that weight shouldn't any longer be regarded as simply a property possessed by a "heavy body", but that a body that seems to be heavy is in fact being attracted by another body with mass, in this case, the earth. So it tends to push downwards towards the center of the earth, against anything (such as your hand) that gets in the way to prevent it from falling. When you weigh something, you're measuring how difficult it is to prevent the heavy body from moving downward.

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12y ago
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5mo ago

Isaac newton named the force of gravity "gravity" from the Latin word "gravitas," which means heaviness or weight. He chose this name to describe the force that causes objects with mass to be attracted to one another.

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Q: Why did Isaac Newton call gravity gravity?
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