Gravity (Science Experiments)
Gravity: How fast do different objects fall?
Design Your Own Experiment
Earth orbits the Sun. The Moon orbits the Earth. But how do the planets stay in the sky? How do we stay on Earth's surface? Englishman Sir Isaac Newton (1642727) figured out the answers to these questions while watching an apple fall in his orchard. Newton reasoned that the force that pulls the Moon into its curved path around Earth instead of a straight line was the same force that pulled the apple to the ground. Newton was a scientist and mathematician, and he wrote his theory on a scrap of paper, something he did with all his thoughts and formulas. The falling apple initiated his famous , which states that the attracting force between any two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. It was published in his book Principia in 1687.
Danish scientist Tycho Brahe (1571630)
developed a theory of planetary motions. Then, in 1609, Johannes Keppler used Brahe's theory when he...
(The entire section is 2460 words.)
Show us the love and view this for free! Use the facebook like button, or any other share button on this page, and get this content free!free!
Want to Read More?
Subscribe now to read the rest of this article. Plus get complete access to 30,000+ study guides!