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Gravitation, also known as gravitational attraction, is the mutual attraction between all masses in the universe.Gravity is the gravitational attraction at the surface of a planet or other celestial body; [6] gravity may also include, in addition to gravitation, the centrifugal force resulting from the planet's rotation (see § Earth's gravity).
For two pairwise interacting point particles, the gravitational potential energy is the work done by the gravitational force in bringing the masses together: = =, where is the displacement vector between the two particles and denotes the scalar product.
English mathematician Isaac Newton used Descartes' argument that curvilinear motion constrains inertia, [90] and in 1675, argued that aether streams attract all bodies to one another. [ j ] Newton (1717) and Leonhard Euler (1760) proposed a model in which the aether loses density near mass, leading to a net force acting on bodies.
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The New York Mets wanted Juan Soto to know his future with them could be set in stone. When the free agent outfielder traveled to owner Steve Cohen's house in Beverly Hills, California, for a ...
By making this assumption, g takes the following form: = (i.e., the direction of g is antiparallel to the direction of r, and the magnitude of g depends only on the magnitude, not direction, of r). Plugging this in, and using the fact that ∂ V is a spherical surface with constant r and area 4 π r 2 {\displaystyle 4\pi r^{2}} ,
The NFL only considers kickoffs, safety kicks or onside kicks to be free kicks and specifically states that a fair-catch kick "is not a free kick." There's also this from Rule 10, Section 2 ...
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