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  2. Learn All About Earth’s Gravity - Physics Forums

    www.physicsforums.com/insights/all-about-earths-gravity

    Earth’s gravitational field at the surface is approximately 9.8 Newtons/kilogram. The deviation in Earth’s surface gravity due to latitude is about 0.7%. The variation due to local density and topography of the land is about 0.02%. The geoid is the hypothetical shape the Earth would take if its surface were completely covered in the ocean.

  3. Calculate Gravitational Field on Torus Using Gauss' Law - Physics...

    www.physicsforums.com/threads/calculate-gravitational-field-on-torus-using...

    The formula for calculating gravitational field on a torus using Gauss' Law is g = G * M / R2, where g is the gravitational field strength, G is the universal gravitational constant, M is the mass enclosed by the surface, and R is the distance from the center of the torus to the point at which the field is being calculated. 3.

  4. How is the Gravitational Field Calculated at a Point P between...

    www.physicsforums.com/threads/how-is-the-gravitational-field-calculated-at-a...

    The correct answer for the resultant gravitational field is \frac {2GMr} { (a^2+r^2)^ {3/2}} towards the center of mass. The distance from the source mass to the field point is represented by "r" and the contribution formula for each source mass is GM/r^2. Nov 4, 2005. #1. dekoi. Compue the magnitude and direction of the gravitational field at ...

  5. Paradox: Thermodynamic equilibrium does not exist in...

    www.physicsforums.com/threads/paradox-thermodynamic-equilibrium-does-not-exist...

    218. Petr Matas said: Theorem: A gas column in thermodynamic equilibrium in a classical homogeneous gravitational field has the same temperature everywhere. Proof using the laws of motion: Let at time 0 a point particle with mass is located at height 0 and its velocity is . Its total energy is. Let us assume the particle moves without collisions.

  6. Is 'g' Negative? Understanding the Confusion of Definitions

    www.physicsforums.com/threads/is-g-negative-understanding-the-confusion-of...

    More generally, the gravitational field can be defined as the negative gradient of the gravitational potential ##\mathbf{g} = -\nabla \Phi## as voko pointed out; this is obviously a vector field. You are merging two different things here. g and Gravitational field are two very different things.

  7. Relationship between gravitational field strength and potential

    www.physicsforums.com/threads/relationship-between-gravitational-field...

    Gravitational field strength is defined as the magnitude of the force per unit mass, while gravitational potential is the negative of the potential energy per unit mass. The formula for gravitational field strength is a scalar, while the full formula is a vector that points towards the larger mass. This explains the difference in signs between ...

  8. How Do You Calculate the Gravitational Field Strength on Mars?

    www.physicsforums.com/threads/how-do-you-calculate-the-gravitational-field...

    It is approximately 38% of Earth's gravitational field. 2. How is the gravitational field of Mars calculated? The gravitational field of Mars is calculated using the formula F = GmM/r^2, where G is the gravitational constant, m is the mass of Mars, M is the mass of the object being pulled by Mars, and r is the distance between the two objects ...

  9. Paradox: Thermodynamic equilibrium does not exist in...

    www.physicsforums.com/threads/paradox-thermodynamic-equilibrium-does-not-exist...

    Petr Matas said: Gas in a graviational field in thermodynamic equilibrium is cooler at the top and hotter at the bottom. This effect is called adiabatic temperature gradient. It is also present in the Earth's atmosphere, where the temperature decreases with increasing height, unless disturbed by external energy flows.

  10. Gravitational field between two planets. - Physics Forums

    www.physicsforums.com/threads/gravitational-field-between-two-planets.210646

    The gravitational field between two planets is calculated using Newton's Law of Universal Gravitation, which states that the force of attraction between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. 2. What factors affect the strength of the ...

  11. Gravitational field Strength Inside the Earth - Physics Forums

    www.physicsforums.com/threads/gravitational-field-strength-inside-the-earth.621773

    The gravitational field strength inside the Earth is calculated by using the equation g = GM/r^2, where G is the universal gravitational constant, M is the mass of the Earth, and r is the distance from the center of the Earth to the point in question. 3.