The first human being believes that "when there are two objects in which the mass is released from the hospital. Under the gravity of Earth. An object with a mass, rather than falling to the floor ", which was presented by the title" Aristo " Scholars of this registry kokwam wok, tea has been accepted and later, another for hundreds of years without trial. Check or even asking to check accuracy. Galileo PAROS Le e with an experiment at leaning of Pisa Plaza Hotel.The study of modern theory of gravity was first proposed by Galileo PAROS Le e (Galileo Galilei, 1564-1642) in the late 1990s, 16 trial of Galileo is to experiment with different mass release 2 piece from the Tower of Pisa leans at the time that the object was to fall under gravity in the world and to the floor almost at the same time, which is to prove the idea that stony title for their service is not valid. Galileo has shown that an object moving under Earth's gravity. At the same acceleration regardless of whether it would have any mass, according to the.Rules of the gravity between masses of NewtonProf. Sir Isaac Newton (1642-1726 Sir Isaac Newton r.), British mathematician and physics is an important person to learn about gravity. The theory, making him the most famous is the discovery of Earth's gravity rules. (The Law of Gravitation), where he was discovered by accident in one theory as Newton is seated in place, and horoscope Monday, wondering why the Moon revolving around the Earth. While he is seated, phloen mongduang Chan is hear the Apple Newton was born the very doubts surface agreements. why objects need to agree to the ground always why not fly in the sky? Newton thought that there must be something that makes a strong Apple agreed to ground. ** From Newton doubts started to experiment on Earth's gravity. The first step is to bring the trial rocks come to tie the rope and then swing around Newton concluded from this experiment that the ropes are a major cause rocks to navigate around the swing does not float to the shingles. So, why the world. The planets revolving around the Sun and moon must be rotated to turn round the world are caused by gravity at the Sun towards the Earth. And the planets and Earth's gravity affects the Moon, including the reasons why Apple agreed to the ground, caused by the Earth's gravity. Writings in 1687 Principia Philosophiae Naturalis story, Mathematica (commonly called that the Principia) is considered to be one of the most influential books in the history of science is the Foundation of the original mechanics courses. In the writings described universal gravitation and the rules to rule the motion of Newton, which is the scientific rules as a pillar of the physical universe study throughout the next Newton shows that the movement of objects on Earth and objects in the sky are the natural rules of the same type under the. By demonstrating the consistency between the rules of the movement of the planets of the Cape with his theory of gravity, which helps confirm the concept of the Sun is the center of the universe and help advance science revolution. A section of text in the book, The Principia, which described gravity between masses. "I deduced that the forces which keep the planets in their orbs must [be] reciprocally as the squares of their distances from the centers about which they revolve and thereby compared the force requisite: to keep the Moon in her Orb with the force of gravity at the surface of the Earth; and found them answer pretty nearly." gravity varies between the mass corresponds to the size of the mass and the two inverse square of the distance between the center of mass both.When the F1 and F2 is the gravity between two masses m1 and m2 are the masses of the two objects, r is the distance between the center of mass, the two Stoppers. Section G is a Universal constant, or a constant of gravity, which has a value of about 6.674 × 10 − 11. N m2 kg−2..นิวตันเองนั้นไม่ได้ระบุค่า G หรือค่า Universal constant of gravity ในการตีพิมพ์งานของเขา ค่า G ที่เราใช้อยู่ในปัจจุบันนั้นเป็นค่าที่ถูกค้นพบหรือคำนวณออกมาภายหลังการตีพิมพ์หนังสือ The Principia ถึง 111 ปี หรือ 71 ปีหลังจากการเสียชีวิตของนิวตัน โดยเป็นผลงานของ เฮนรี คาเวนดิช(Henry Cavendish) ในปี ค.ศ. 1798 *** คาเวนดิชได้ทำการทดลองเพื่อทดสอบกฎแรงดึงดูดระหว่างมวลของนิวตัน โดยได้แขวนดัมเบล (dumb-bell) ที่ทำด้วยตะกั่วและมีขนาดเล็ก ด้วยเส้นด้าย แล้วให้ดัมเบลนี้อยู่ระหว่างมวลที่มีขนาดใหญ่ 2 ลูก แรงดึงดูดแบบโน้มถ่วงระหว่างดัมเบลลูกหนึ่งกับมวลขนาดใหญ่ก้อนหนึ่งจะทำให้เส้นด้ายบิดตัวไปเล็กน้อย ดังนั้นเมื่อ Cavendish วัดมุมที่เส้นด้ายบิดตัวไป รู้มวลของดัมเบลรวมทั้งมวลขนาดใหญ่และแรงโน้มถ่วงที่เกิดขึ้นระหว่าง ดัมเบลกับมวล เขาก็สามารถรู้ค่า G ได้ จากนั้นมานักฟิสิกส์ได้พยายามปรับปรุงวิธีการวัดค่า G ให้ละเอียดขึ้นและถูกต้องยิ่งขึ้น
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