gravity by: cj miske. what is gravity? gravity is the force that causes two particles to pull...
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Gravity
By: CJ Miske
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What is gravity?
• Gravity is the force that causes two particles to pull towards each other.
• The force of attraction by which terrestrial bodies tend to fall toward the center of the earth.
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Founder of Gravitational Theory
• Sir Isaac Newton
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Isaac Newton• Newton’s life (January 4, 1643 –
March 31, 1727)• Newton was an English physicist,
mathematician, astronomer, natural philosopher, alchemist, and theologian.
• Published “Mathematical Principles of Natural Philosophy” in 1687. (One of the most important scientific books ever written)
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Gravitational Theory
• Newton's law of universal gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
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Could We Survive Without Gravity?• Without gravity, the air in the
atmosphere has no reason to hang around, and it would immediately leap into space.
• This is the problem the moon has - the moon doesn't have enough gravity to keep an atmosphere around it, so it's in a near vacuum. Without an atmosphere, any living thing would die immediately and anything liquid would boil away into space. Sooo… No!
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What type of force is Gravity?
• Pull
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So What Do We Know About Gravity?
• It causes any two objects in the universe to be drawn to one another.
• Gravity assisted in forming the universe.• It keeps the moon in orbit around the Earth,
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Gravity and the Black Hole
• When gravity gets to extreme and overwhelms all other forces in the universe, it causes a black hole.
• Once inside, nothing can escape a black hole's gravity — not even light.
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Video
• http://www.youtube.com/watch?v=Arr-5oihTm4
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Works Cited• "Newton's Law of Universal Gravitation." Wikipedia, the Free
Encyclopedia. Web. 09 Apr. 2011. <http://en.wikipedia.org/wiki/Newton's_law_of_universal_gravitation>.
• "Gravity | Define Gravity at Dictionary.com." Dictionary.com | Free Online Dictionary for English Definitions. Web. 09 Apr. 2011. <http://dictionary.reference.com/browse/gravity>.
• "Answers.com - Who Is the Founder of the Law of Gravity." WikiAnswers - The Q&A Wiki. Web. 09 Apr. 2011. <http://wiki.answers.com/Q/Who_is_the_founder_of_the_law_of_gravity>.
• http://science.howstuffworks.com/environmental/earth/geophysics/what-if-zero-gravity1.htm