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- Also known as: Gravitation
- Responsible for keeping objects on Earth's surface
- Responsible for the orbit of the planets
- Observed force is stronger on planets with more mass
- Acceleration due to gravity on Earth is 9.8 m/s2
- Heavier objects will not accelerate faster than lighter objects
- First scientifically established by Sir Isaac Newton in 1665NASA Worldbook: Gravitation
- Albert Einstein established a more complex gravitational model in 1915
- Einstein's model does not contradict the Newtonian modelNASA Worldbook: Gravitation
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Gravity is a physical force that will attract two objects of mass toward each other. On Earth, it is the force that pulls all objects towards the surface of the planet. It also creates the sensation of weight. In interstellar space, it is observed as the force which keeps objects in orbit around one another.
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Newton's Law
Sir Isaac Newton's observations about gravity culminated in a simple relationship known as Newton's Law:- The gravitational force between two objects is directly proportional to their masses
Represented mathematically:
- ForceGravity = (Mass1 * Mass2) / (Distance2)
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Gravity Questions
Can life survive in low gravity or zero gravity indefinitely? 3 AnswersGravity determines the scale of many physical phenomena on and above a world's surface. Assuming that toolusing intelligences come from, and would settle, world... read more
Why does gravity take affect instantly? 2 AnswersGravity is not faster than light. According to general relativity, the speed of gravity is equal to the speed of light. General relativity agrees with observati... read more
How is Anti-hydrogen affected by gravity? 1 AnswerAnti-hydrogen has the same mass as hydrogen. It will be affected by gravity the same way hydrogen is. read more
What is the quantum theory for how gravity works? 1 AnswerThis is one of the largest questions ever asked. Nobody has found a definitive answer yet, although there are many ideas. Hopefully my link provides a little bi... read more
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On Twitter Powered by Twitter
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It's time to try defying gravity. Kiss me goodbye, I'm defying gravity. And you can't pull me down...
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#gravity 追推指南：直接点击@某某id，即可追某id的推。我30分钟前发了list指南，请追推。RT @wbj6092: @baby_1224 请问某宝同学，gravity（6100） 如何添加 list呢？
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@nii_teiko last question ( am being a PITA i know sorry) Can i have radio,podcast app, Nokia mail gravity and web opened at same time?
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RT @urlgirl: Achy self: 0 / Gravity: 1000. Raising white flag and taking self to bed.
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