Can gravity exist without mass? - Physics Forums
Apr 14, 2008 · The mass of such a spacetime is determined by the orbits of test particles around the center of the gravitating body. And no, that is not gravity without matter. I believe that the question referred to whether the presence of a gravitational field is …
How much mass do you need to create Gravity? - Physics Forums
Nov 6, 2008. Gravity Mass. In summary, the amount of mass required to create a substantial amount of gravity to hold a human depends on the density and location of the mass. The closer the mass is to the human, the greater the gravitational pull. Density also plays a role, as a denser planet would exert more gravity than a less dense one with ...
Unraveling the Mystery of Gravity: The Role of Mass in Space-Time ...
Mar 28, 2010 · Gravity is the distortion of spacetime which is caused by matter embedded in spacetime. This distortion creates a "gravity well" with the bottom of the well being the center of mass of the object creating the distortion. Here's a very simplified scenario.
Gravity - a function of mass or of density? - Physics Forums
Jul 12, 2004 · Gravity is a function of mass, not density. The greater the mass of an object, the stronger its gravitational pull. Density may affect the distribution of mass within an object, but it does not directly determine the strength of gravity. 2.
What Came First, Gravity or Mass? - Physics Forums
Oct 26, 2006 · Which came first, gravity or mass? This question is a bit of a philosophical one, as both gravity and mass have existed since the beginning of the universe. However, scientists believe that mass came first, as it is a fundamental property of matter, while gravity is a force that is created by the presence of mass. 3.
Gravity & Mass: Acceleration, Force & Basics Explained - Physics …
Mar 7, 2018 · Gravity cannot be shielded or cancelled. It is a fundamental force that acts on all objects with mass. However, the effects of gravity can be reduced in certain situations, such as in space where there is very little mass to exert a gravitational force, or in areas with strong gravitational fields where other forces can counteract its effects.
Calculating Gravity: Mass, Radius & Wall Thickness - Physics Forums
Jul 13, 2017 · FAQ: Calculating Gravity: Mass, Radius & Wall Thickness. 1. What is the formula for calculating gravity? The formula for calculating gravity is F = G (m1m2)/r^2, where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between the two objects.
Gravity: Point where Earth's Gravity and the Moon's ... - Physics …
Nov 27, 2006 · The mass of the Moon is 7.35*10^22 Kg. At some point between Earth and the Moon, the force of Earth's gravitational attraction on an object is canceled by the Moon's force of gravitational attraction. If the distance between Earth and the Moon (centre to centre) is 3.84*10^5 Km (3.84*10^8 m)...
The relationship between friction and mass - Physics Forums
Jun 17, 2020 · 2. How does mass affect friction? The greater the mass of an object, the more force is needed to overcome the friction between the object and the surface it is moving on. This means that as mass increases, so does the amount of friction. 3. What is the relationship between friction and surface area?
Understanding Gravity and Mass: A Confusing Concept Explained
Dec 23, 2009 · The mass that feels the presence of another mass does so because it's responding to the characteristics of spacetime in it's own local vicinity. There's no assumption about a force from the first mass reaching across a distance to pull on the second mass, so many people say that gravity isn't a force.