15MAY 2025
Force of gravity Calculator

Force of gravity Calculator

If you fill in the height, you ll get the time and speed at the end of your fall. If you re kind enough to supply your mass, you ll also get the energy in joules (newton-meters) when you hit the deck. :-) See the to see how impact velocity varies with height. As is probably obvious, the higher you are…

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06MAY 2025
Gravitational force Equations

Gravitational force Equations

Near the surface of the Earth, use = 9.81 m/s2 (meters per second squared; which might be thought of as meters per second, per second , or 32.2 ft/s2 as feet per second per second ) approximately. For other planets, multiply by the appropriate scaling factor. A coherent set of units for , , and is…

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27APR 2025
Equation for universal Gravitation

Equation for universal Gravitation

Figure 1: Portrait of Isaac Newton (by courtesy of SEDS). Newton s Laws of Motion Law of Inertia: A body continues in its state of constant velocity (which may be zero) unless it is acted upon by an external force. Fundamental Law of Dynamics: For an unbalanced force acting on a body, the acceleration…
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18APR 2025
Gravitational field Physics

Gravitational field Physics

Variation of g with distance from the centre of a uniform spherical mass of radius, R Variation of g on a line joining the centres of two point masses If m1 > m2 then The potential at a point in a gravitational field is equal to the work done bringing a 1kg mass from infinity to that point. The…
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09APR 2025
Space time distortion

Space time distortion

We are used to thinking of time as absolute and universal, so it is disturbing to find that it can flow at a different rate for observers in different frames of reference. But consider the behavior of the γ factor shown in figure h. The graph is extremely flat at low speeds, and even at 20% of the speed…
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31MAR 2025
Gravitational force equation Calculator

Gravitational force equation Calculator

Newton s Law of Gravity states that Every particle attracts every other particle with a force that is proportional to the product of their masses and inversely proportional to the distance between them. where, G = Universal Gravitational Constant = 6.6726 x 10-11N-m2/kg2 m1 = Mass of Object 1 m2 = Mass…
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22MAR 2025
What is dark matter?

What is dark matter?

Years ago I read an article by Martin Rees, in which he surveyed the options for what the dark matter of the universe might be. I forget the exact wording, but near the end he said something like “There are so many candidates, it would be quite surprising to find ourselves living in a universe without…
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13MAR 2025
Quantum Physics, Theories

Quantum Physics, Theories

Quantum theory is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic and subatomic level. The nature and behavior of matter and energy at that level is sometimes referred to as quantum physics and quantum mechanics. In 1900, physicist Max…
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