 # Where Does Gravity Get Its Energy From?

## Why gravity is not repulsive?

The “gravitational force” is part of a theory of gravity that explains the phenomenon in terms of forces (so you can use Newton’s Laws of motion to make predictions).

There is no way a repulsive force describes that.

General Relativity is a better theory, but it has no gravitational force in it..

## Does light have gravity?

Light has energy, energy is equivalent to mass, and mass exerts gravitational force. Thus, light creates gravity, i.e. the bending of space-time. … Thus, in order for light to generate a gravitational field like that of the Earth, it would need to have the mass (energy) of the Earth.

## Does gravity attract energy?

Ask a Physicist Answers Although photons have no mass, they do have energy, and the gravity of a black hole (or any other gravitating body) will attract them. According to Einstein’s theory of gravity, it is energy, not mass, that feels the gravitational force. That’s the short answer.

## Can we produce electricity from gravity?

As you are aware, gravity is a powerful, natural force that, like many other forces, humans have begun harvesting to make electricity. Hydroelectric dams may use water, but they also use gravity to help produce electricity. … Movement is kinetic energy, and you need to convert that into electricity.

## What power does gravity have?

The energy that powers gravity is the virtual particle foam of space occurring within the nucleus of atoms. … Gravity is negative energy. The reason is that if you add positive energy to two objects attracted by gravity then the magnitude of the gravitational force reduces, as they move further apart.

## Why is gravity only an attractive force?

Because mass is positive The force of gravity, FG is proportional to the product of the masses and inversely proportional to the distance, r, squared. … G is simply a bookkeeping constant that allows us to get the right answer for the force based on any choice of units for mass and distance.

## Why is gravity only attractive?

Gravity is always attractive, because masses of like “charge” attract. … The other way you could have repulsive gravitation would be to have an object that actually has a negative mass or negative energy density – it would push away ordinary positive mass objects.

## Can the force of gravity be repulsive?

Gravitational force can be repulsive if mass is negative.

## Which force is always attractive in nature?

gravityIn the case of gravity, mediated by spin 2 particles, charge is mass, which is always positive. Thus, q1q2 is always greater than zero, and gravity is always attractive. For spin 0 force mediators, however, there is no restriction on the charges and you can very well have repulsive forces.

## What would happen if Earth’s gravity was weaker?

The lack of any forceful gravitational pull would turn humans – and anything else with mass, like cars and buildings – into very fast-moving tumbleweeds. That’s because the planet would continue spinning, without exerting gravity to keep objects tied to it [source: Domanico].

## What is gravity made of?

They proposed that gravity is actually made of quantum particles, which they called “gravitons.” Anywhere there is gravity, there would be gravitons: on earth, in solar systems, and most importantly in the miniscule infant universe where quantum fluctuations of gravitons sprung up, bending pockets of this tiny space- …