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Everyone has to learn about gravity sometime!
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Some people learn about it when they're young.
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Some people learn about it when they're old.
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This co-ed just learned that gravity causes you to accelerate at 9.8 meters per second squared.
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This young man just learned that that is really fast!
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This tree just taught this gentleman that all falling objects travel at 9.8 m/s squared, regardless of size.
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So gravity is a great equalizer.
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Sir Isaac Newton was the first to accurately describe how gravity works in 1690. This boy just figured it out in 2013.
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Newton's gravitation equation is F = Gm1m2/r2.
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Where "F" is the force due to gravity, between two masses.
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Which are a distance "r" apart
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"G" is the gravitational constant that will always be there.
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This cat just learned that gravity is dependent on mass differential.
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And the young man in the middle just learned the force of gravity is dependent on distance between objects.
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Acceleration due to gravity on the surface of the earth is g = GM/r2.
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Where "M" is the mass of the Earth.
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And "r" is the radius of the Earth (or distance between the center of the Earth and you, standing on its surface).
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And "G" is the gravitational constant.
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These two making out just learned about gravitational acceleration!
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Einstein’s theory of general relativity (GR) is Gμν = 8πG/c4 Tμν.
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It is a very accurate theory of gravity.
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Where "G" (without the subscripts) is the gravitational constant.
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And "c" is the speed of light.
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This young lady just learned that Einstein was right!
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Gravitational Potential Energy is Eg = mgh.
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Where "m" is mass of object...
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..."g" is acceleration due to gravity...
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..."Eg" is the amount of gravitational potential energy an object has when it is near the surface of the Earth...
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...and "h" is height of object above the surface of Earth.
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Marines now know about gravitational potential energy!
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Large objects in the universe are also subject to gravitational acceleration: a = √(GMa0/r)
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Where where "a" is the acceleration an object feels...
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..."M" is the mass of a galaxy...
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..."r" the distance between the object and the center of the galaxy...
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...and "G" is the gravitational constant.
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This cameraman does not appreciate the mass of the universe.
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Sadly, none of these equations can determine the acceleration of gravity between two bros.
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So keep it up, guys...
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You're gonna nail it someday!
