Gravity is the force exerted by all objects having mass on all other objects having mass. As first suggested by Newton, the acceleration of a mass m towards a second mass M is given by g = {GM\over r^2}, where G is the gravitational constant and r is the separation distance between the two masses.
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scienceworld.wolfram.com/physics/Gravity.html
scienceworld.wolfram.com/physics/Gravity.html
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Newton was able to make a mathematical model that encompassed both objects falling because of gravity on Earth, and the motion of heavenly bodies in the skies. One of the important formulas in Newton's model is his law for calculating the force of gravity between two objects 1 and 2 with mass m1 and m2,
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www.theory.caltech.edu/people/patricia/gravtop.html
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Gravity, Quantum Physics, & General Relativity ... Newton's law of gravity defines the attractive force between all objects that possess mass. Understanding the law of gravity, one of the fundamental forces of physics, offers profound insights into the way our universe functions.
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physics.about.com/od/classicalmechanics/a/gravity.htm
physics.about.com/od/classicalmechanics/a/gravity.htm
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Fear of Physics; This interactive simulation helps beginners visualize and understand gravity. Choose different objects to see how they would fall to the ground. NOTE: The site includes ads. Your Weight on Other Worlds;
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www.emints.org/ethemes/resources/S00000579.shtml
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Most students of physics progress at least to this level of sophistication concerning the notion of gravity. This same force of gravity acts upon our bodies as we jump upwards from the Earth. As we rise upwards after our jump, the force of gravity slows us down.
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www.physicsclassroom.com/class/circles/u6l3a.cfm
www.physicsclassroom.com/class/circles/u6l3a.cfm
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F is the force of gravity, G is a constant (the Gravitational Constant) which can be measured, m1 and m2 are the masses of the two objects (earth and apple or earth and moon, in the above text), and d is the distance between them.
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www.jimloy.com/physics/gravity.htm
www.jimloy.com/physics/gravity.htm
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Every time you jump, you experience gravity. It pulls you back down to the ground. Without gravity, you'd float off into the atmosphere -- along with all of the other matter on Earth. ... Physics: Primal Forces...
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science.howstuffworks.com/question232.htm
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This book is part of a series on Modern Physics: ... Waves - wp; General Mechanics - wp; Special Relativity - wp; Quantum Mechanics - wp; Electrodynamics - wp; Nuclear Physics - wp; ... Category: Modern Physics...
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en.wikibooks.org/wiki/Modern_Physics:Gravity:Contents
en.wikibooks.org/wiki/Modern_Physics:Gravity:Contents
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Modern science is still not able to give a convincing explanation of how gravity works. It struggles to explain how two bodies can pull on one another at large distances. ... The very same waves that in the aether model are responsible for the creation of particles, giving us a way of unifying gravity and quantum mechanics.
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www.esotericscience.com/Gravity.aspx
www.esotericscience.com/Gravity.aspx
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