Why is gravity attractive force and not repulsive?
In 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.
Does gravity attract objects to repel?
Unlike the other two fields, which can involve both attraction and repulsion, gravity only acts by attraction. All objects attract each other by gravity, but these attractions are too weak to notice unless one object contains a huge amount of matter (stuff).
Why does gravity always attract?
In 1915, Albert Einstein figured out the answer when he published his theory of general relativity. The reason gravity pulls you toward the ground is that all objects with mass, like our Earth, actually bend and curve the fabric of the universe, called space-time. That curvature is what you feel as gravity.
How does gravity repel?
Gravity is the mutual attraction of matter and energy. Anti-gravity would imply that matter and energy would somehow mutually repel. If gravity causes two planets to attract each other, anti-gravity would cause them to repel each other. The repulsive force, however, is the property of empty space itself.
Is gravity attractive and repulsive?
Both 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 .
Is gravity an attractive force?
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.
Is the gravitational force ever repulsive?
When we are at rest or we are nearer to the surface of the Earth, the gravitational force is similar to the weight of the object. Complete answer: … Hence, the nature of the gravitational force will always be attractive and not repulsive. Thus, we can conclude that gravitational force cannot be repulsive.
Can gravity 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.
Does electric force attract or repel?
Electric forces are repulsive for objects of like charge and attractive between objects of the opposite type of charge or between charged objects and neutral objects.
What are the two factors that affect gravity?
When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.