Newton: The Mind That Found The Future
Newton: The Mind That Found The Future PHY 11030-011
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This 2 page Class Notes was uploaded by Amy Turk on Friday May 20, 2016. The Class Notes belongs to PHY 11030-011 at Kent State University taught by Dr. Jonathan Secaur in Spring 2016. Since its upload, it has received 8 views. For similar materials see 7 Ideas That Shook The Universe in Physics 2 at Kent State University.
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Date Created: 05/20/16
NEWTON: THE MIND THAT FOUND THE FUTURE ● different laws had to apply on earth and in the heavens ● science begins from theories or hypotheses that you have to prove ● in newton’s time, the gravity was in the apple ● all forces (including gravity) are between two objects, acting equally on both ○ newton’s 3rd law ● the natural path of a speeding object is a straight line, constant speed ○ uniform motion ● newton’s 1st law ● according to Halley, the force of gravity varies inversely with the square of the distance ● newton’s law of universal gravitation = everything attracts everything else ○ force is directly proportional to the two masses ○ force is inversely proportional to the separation of their centers, squared ● the resulting path of a planet = an ellipse Newton’s Methods ● conduct experiments on your own if you can ● more theoretical work ● no need to explain why ● sufficient to describe how Newton’s Other Achievements ● calculus = needed for law of gravity ● reflecting telescope ● developed color theory ● had a theory on the nature of light, which was not correct ● Halley’s role in developing and publishing Newton’s laws… ○ talked Newton into redoing his lost calculations ○ helped with some of the math ○ paid for the whole process ● the moon, the earth, and the sun are falling but moving so fast sideways that they never hit ● How fast would an apple have to travel to orbit the earth? ● 5 miles a second ● an object dropped from rest falls 5 meters in the first second ● if you drive 5 miles in any direction (on a smooth Earth) you are 5 meters lower ● moving sideways at 5 miles a second, the surface of the earth falls away under you as rapidly as you are falling ● you fall forever, never hitting ● astronauts orbit above the atmosphere because there’s no air there, not because there is no gravity there
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