Why does gravity become repulsive?
How is gravity mediated?
What would happen if quantum physical objects were not perfectly conservative?
What is the inverse square?
What is the only known source of expansion components of gravity?
Which theory shows that the forces between two particles have to be either of the inverse square k/r2?
Can spin 0 have repulsive forces?
See 4 more
About this website
Why are gravitational interactions attractive?
A body that has mass always attracts another body having mass and the force between them is given by Newton's law of gravitation. If there were repulsive gravitational forces, it would imply that the body has negative mass which is not possible. Hence, gravitational forces are always attractive in nature.
Are gravitational forces attractive?
Gravitational force -an attractive force that exists between all objects with mass; an object with mass attracts another object with mass; the magnitude of the force is directly proportional to the masses of the two objects and inversely proportional to the square of the distance between the two objects.
Are gravitational fields attractive or repulsive?
attractiveBoth in the Newton theory of gravitation and in the General Theory of Relativity the gravitational force is exclusively attractive one. However, the quantization of gravity shows that the gravitational forces can also be repulsive [3].
Is gravitational field always attractive?
Answer and Explanation: Gravitational force is always attractive based on the traditional understanding of matter, which has a positive mass. As long as the mass of the objects is positive, the formula for calculating the magnitude of gravitational force is also positive, resulting in an attractive force.
Which forces are only attractive?
Gravitational force can only be attractive. It cannot be repulsive. But both electrostatic & magnetic forces can be attractive or repulsive depending upon the nature of charges or magnetic poles.
Why does gravity attract and not repel?
Mass only bends space in one direction; that makes it an 'attractive' force. For it to be repulsive, it would need to bend space the opposite way - and, there are a couple of theories about that, but that 'negative mass' can't exist in our universe.
Can gravitational fields be repulsive?
Surprisingly, gravity not only can get weaker in the near future, it can even become repulsive; or equivalently, the gravitational potential may become negative.
Do gravitational fields repel?
Unlike the other two fields, which can involve both attraction and repulsion, gravity only acts by attraction.
How do you know if it's attractive or repulsive force?
The force is repulsive if both of the interacting particles have a positive or negative charge.When two particles interact and have opposing charges, the force is attractive in nature.This property of electric charges is described by Coulomb's law.
Can gravitational be repulsive?
It is shown that reduction of the gravitational mass of the system due to emitting gravitational waves leads to a repulsive gravitational force that diminishes with time but never disappears. This repulsive force may be related to the observed expansion of the Universe.
Why is gravity always attractive? | Physics Forums
Antimatter does not have anti-gravity. Gravity, sound, light, ect all propagate from antimatter the same way they do from matter. Anti-mass would have anti-gravity, but its all theory so i dont know and im not going to keep going because that kind of a discussion doesnt belong in the general physics section.
Assertion : Gravitational force is always attractive in nature, while ...
Click here👆to get an answer to your question ️ Assertion : Gravitational force is always attractive in nature, while electromagnetic force can be attractive or repulsive.
CBSE Class 9 Answered
The acceleration produced in freely falling body due to gravitational force is called acceleration due to gravity.
A sphere of mass 40 kg is attracted by a second sphere of ... - Toppr Ask
Click here👆to get an answer to your question ️ A sphere of mass 40 kg is attracted by a second sphere of mass 15 kg, when their centres are 20 cm apart, with a force of 0.1 milligram weight. Calculate the value of gravitational constant.
What is the Relation between G and g? - Definition, Nature of ... - BYJUS
Visit BYJU’S to understand the relation between G and g along with formula, units, and values also, learn about Universal gravitational constant and acceleration due to gravity.
How to find the universal gravitational constant?
We have two objects, and: 1 Each object has a PVector location: location1 and location2. 2 Each object has a numeric mass: mass1 and mass2. 3 There is a numeric variable G for the universal gravitational constant.
What happens if you add one line of code and grab the magnitude of that vector before normalizing it?
Well, if we add just one line of code and grab the magnitude of that vector before normalizing it, then we’ll have the distance.
Why does the Earth pull the apple?
In truth, just as the earth pulls the apple towards it due to a gravitational force , the apple pulls the earth as well. The thing is, the earth is just so massive that it overwhelms all the gravity interactions of every other object on the planet. Every object with mass exerts a gravitational force on every other object.
How to make a vector?
A vector is the difference between two points. To make a vector that pointed from the circle to the mouse, we simply subtracted one point from another: var dir = PVector.sub (mouse, location); In our case, the direction of the attraction force that object 1 exerts on object 2 is equal to: var dir = PVector.sub (location1, location2);
What is the variable G?
There is a numeric variable G for the universal gravitational constant.
What is the strength of the force?
With everything on the top of the formula— G, , —the bigger its value, the stronger the force. Big mass, big force. Big G, big force. Now, when we divide by something, we have the opposite. The strength of the force is inversely proportional to the distance squared. The farther away an object is, the weaker the force; the closer, the stronger.
Is constraining distance a good technique?
Now, it’s really up to you to decide what behaviors you want. But in the case of, “I want reasonable-looking attraction that is never absurdly weak or strong,” then constraining the distance is a good technique.
What is the gravitational force?
Newton stated that the gravitational force acts between all objects having mass (including objects ranging from atoms and photons, to planets and stars) and is directly proportional to the masses of the bodies and inversely proportional to the square of the distance between the bodies. Since energy and mass are equivalent, all forms of energy (including light) cause gravitation and are under the influence of it. The range of this force is ∞ and it is weaker than the other forces. This relationship is shown in the equation below.
What is the theory of gravity?
General theory of relativity is the fundamental theory of gravity. This theory describes gravity not as a force, but as a consequence of the curvature of spacetime caused by the uneven distribution of mass. In theories of quantum gravity, the graviton is the hypothetical elementary particle that mediates the force of gravity.
Can an observer determine whether a laboratory is in a uniform gravitational field?
An observer cannot determine, in any way whatsoever, whether the laboratory he occupies is in a uniform gravitational field or is in a reference frame that is accelerating relative to an inertial frame.
Is gravity a frame dependent force?
A scale in an accelerating elevator cannot be distinguished from a scale in a gravitational field. Gravitational force and weight thereby became essentially frame-dependent quantities. According to the general theory of relativity, gravitational and inertial mass are not different properties of matter but two aspects of a fundamental and single property of matter.
Why is it important to drop something when it is gravitational?
In order for the gravitational attraction between two objects to be noticeable, at least one of them has to have a very large mass. This explains why, when you drop an object, it is pulled down towards the center of the Earth, and not towards other objects—even very heavy ones like cars or buildings.
What does gravity mean in everyday life?
In everyday language, we describe gravity as the thing that pulls us down toward the surface of the Earth. It's the reason behind the old saying "what goes up, must come down." Experiencing it becomes a regular part of our lives from an early age. For example, as a child you quickly learn that if you trip, you will fall down (and it will hurt!). If you drop a ball, it will fall down to the ground—not go sideways or up.
What would happen if the Earth had no sideways motion?
If the Earth had no sideways motion, it would be pulled into the Sun by the gravitational force. Figure 1. The motion of a twirling ball attached to a rubber band (left) is similar to the motion of the planets in our solar system around the Sun (right). (diagram not to scale) In this lesson plan, your students will create a model for gravity ...
What is the top view of a planet?
A "top" view of a planet orbiting the Sun (as if you were looking down on the sheet from above in this activity). The "sideways" motion of the planet perfectly balances the inward pull of gravity from the Sun, resulting in an elliptical (but nearly circular) orbit.
How can time, space, and energy phenomena be observed at various scales?
Time, space, and energy phenomena can be observed at various scales using models to study systems that are too large or too small. Systems and System Models. Models can be used to represent systems and their interactions. Models are limited in that they only represent certain aspects of the system under study.
Is the Earth's mass bigger than the mass of other objects?
The Earth's mass is much larger than the mass of those other objects. Now tell the students that we will "zoom out" when thinking about gravity. Don't just think about how gravity affects everyday objects on the surface of the Earth. Think about how it affects the motion of planets in our solar system.
Why does gravity become repulsive?
In the classical sense of the meaning, gravity will become "repulsive" as soon as you start to decelerate. The reason for this deceleration is that in contrast to "classical Newtonian mechanics", where the force only increases the momenta by increasing the velocity, and accelerating particles in an accelerator where the electromagnetic force increase the momenta by increasing the "lorentz factor" setting the speed of light to be the speed limit, in general relativity you have the third effect that the speed of light (again as measured by a distant observer) around a spherically symmetric mass distribution decreases with the radial distance.
How is gravity mediated?
Gravity is mediated by a spin two particle. Electromagnetism by spin 1. Here is a link that answers your question: even and odd spin do differ in that they require a product of charges with different signs to get attraction or repulsion:
What would happen if quantum physical objects were not perfectly conservative?
My speculative imaginary view of this has been that if the evolution of quantum physical objects is not perfectly conservative, then there might be processes which convert energy between scales. One possibility is that fields at the scales that determine gravitational interactions would be converted to lower scale matter that is currently not detectable. The result would be both an inflow and an outflow from regions that contain large masses, but on different scales and with different effects, attractive for matter that interacts more with the inflow, repulsive for matter that interacts more with the outflow.
What is the inverse square?
The inverse square is apparently a consequence of conservation of momentum. For two particles in orbit, Newton showed that the orbit is planar, and Bertrand https://en.wikipedia.org/wiki/Bertrand%27s_theorem showed that the forces between the two have to be either of the inverse square k/r^2 or space spring/Hook's law. So Newton's law of gravity and that of Coulomb have conservation of momentum as the origin.
What is the only known source of expansion components of gravity?
Currently the only known source of expansion components of gravity is the cosmological constant, which, incidentally, is precisely the physical quantity that our theories fail to predict by the largest amount: 120 or 60 orders of magnitude, depending on whom you ask. Share. Improve this answer.
Which theory shows that the forces between two particles have to be either of the inverse square k/r2?
For two particles in orbit, Newton showed that the orbit is planar, and Bertrand https://en.wikipedia.org/wiki/Bertrand%27s_theorem showed that the forces between the two have to be either of the inverse square k/r^2 or space spring/Hook's law.
Can spin 0 have repulsive forces?
For spin 0 force mediators, however, there is no restriction on the charges and you can very well have repulsive forces. A better rephrasing of the question is: "Why do particles of odd spin generate repulsive forces between like charges, while particles of even spin generate attractive forces between like charges?".
.gif)