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Unformatted text preview: simply analyze the observable motions of bodies to find what forces were acting on them, and then use his knowledge of these forces to calculate their later motions. In 166566 Newton combined the centrifugal force formula (F = m v 2 /R) with Keplers 3rd Law (R 3 /T 2 = K) to show that all of the planets are drawn toward the Sun with a force whose strength falls off by 1/R 2 (an inverse square law ). Newton began to speculate that the Moon and ordinary bodies around us (such as apples) are drawn toward the Earth by a force that follows the same inverse square law, though there were still gaps in his reasoninggaps he did not fill until 1680s....
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 Fall '11
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 Scientific Revolution

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