PPT-Theme 4 – Newton’s Gravity Applied

ASTR 101 Prof Dave Hanes Orbiting Near Around and Away from the Earth Lets consider Ballistic missiles on Earth Artificial satellites Geosynchronous satellites Actually escaping the Earth. Claudius Ptolemy . –. 87 . –. 150 CE. Nicholas Copernicus . –. 1473 . –. 1543. Galileo . Galilei. . –. 1564 . –. 1642. Johannes . Kepler. . –. 1571 . –. 1630. Isaac Newton . Einstein and Newton. 1. Newtonian Gravity. Newton explains the universe using forces. 2. Newton. Newtonian gravitational theory is based on forces acting on one another.. An object at rest stays at rest and an object in motion stays in motion (in a straight line) until acted upon by another force.. [1.2] “Once the initialization problem was resolved in the 1960s, models based on the primitive equations gradually supplanted those based on the filtered equations.” (D&VK Chapters 8, 13). http://books.nap.edu/html/biomems/jcharney.html. 4. – Newton and Einstein. ASTR 101. Prof. Dave Hanes. Newton . Succeeds!. The orbit of (newly-discovered) Uranus. Halley. ’. s comet (and others, later). The prediction of Neptune. The prediction of Pluto . Motion. Lesson 15. February 8. th. , 2011. Newton’s Second Law of Motion. If the external force on an object is not zero, the objet accelerates in the direction of the net fore. The magnitude of the acceleration is directly proportional to the net force and inversely proportional to the objects mass. . ’. s law of . universal gravitation. :. where:. F is the force of gravitation.. m. 1. and m. 2. are the masses.. r is the distance between the masses.. . . is the gravitational constant that is equal to 6.67x10. Isaac Newton (1642-1727). Galileo found that bodies with different masses experienced the same acceleration when dropped to the ground. But he didn’t know why.. Kepler. discovered that the motions of the planets were perfectly reproduced by 3 mathematical relations. Like Galileo, . – Professional Development Certificate. Finland. Dr. Seija Mahlamäki-Kultanen, Dean. Häme. University of Applied Sciences (HAMK). School of Professional Teacher Education. Modelo Inovador de Ensino Finlandês – Professores para o . Astronomy, Chapter 2. D Taylor. © 2011, 2012, 2013,2014. Gravity and Motion. 2. Introduction. Gravity. gives the Universe its structure. It is a universal force that causes all objects to pull on all other objects everywhere. Earth, Moon, and Sun Gravity and Motion Isaac Newton was the first scientist to explain what keeps the Earth and Moon in orbit Force – a push or a pull There is a force acting between the Earth and the moon that keeps them in orbit Convert the following to scientific notation. Distance from Sun. : 92,960,000 . miles ____. Estimated Age of universe – 14,000,000,000. Convert the following to standard form. Speed of light = 9.0 * 10. An Invisible Force. Gravity. Every object pulls on every other object with an invisible force called . gravity. .. There is . gravity. between you and your toy car, but you won’t notice it because it is so weak.. In the mid-1500s, scientists begin to question accepted beliefs and make new theories based on experimentation. The Roots of Modern Science. The Medieval View. Most knowledge in the Middle Ages comes from the Bible and Greek/Roman sources.. Mark Sonnick. Newton’s Law of Gravitation . Neil DeGrasse Tyson. Chronology. b. . 1642, . Woolsthorpe. , Lincolnshire. 1661: Matriculates at Trinity College, Cambridge. 1665: Newton earns his B.A.; Plague.