Can the gravitational force be either attractive or repulsive?
Yes, both the force between charges and the gravitational force between matter can be either attractive or repulsive.
Why is gravity considered an attractive force?
Gravity is always attractive force because as is most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915) which describes gravity not as a force, but as a consequence of the curvature of spacetime caused by the uneven distribution of mass.
Is gravitational force always attractive or 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 [3].
Why can the electric force be attractive or repulsive where the gravitational force is always attractive?
What is the main difference between electrical and gravitational forces? Explanation: Electric forces can be attractive or repulsive because charges may be positive or negative. In the case for gravitational forces, there are only attractive forces because mass is always positive.
Is gravitational force attractive or repulsive class 9?
We all know that all the forces in nature exist in opposites, but gravitational force is the only force that always attracts every object and never reples any.
Is gravity a repulsive force?
The tension does not pull things together because it is equal on the opposite sides of any given region and so as a force in its own right it cancels out. However the contribution to gravity associated with it does not cancel out, and is always repulsive.
How is gravitational force 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.
Which of the following is a key difference between the electrical and gravitational forces?
They main difference is that gravitational force can only attract to masses, while electrical forces can also repel two charges if they are of same sign.
Which force is attractive as well as repulsive?
Concept Connections: The Four Basic Forces
| Force | Approximate Relative Strengths | Attraction/Repulsion |
|---|---|---|
| Gravitational | 10−38 | attractive only |
| Electromagnetic | 10–2 | attractive and repulsive |
| Weak nuclear | 10–13 | attractive and repulsive |
| Strong nuclear | 1 | attractive and repulsive |
Is gravitational force a non conservative force?
Gravity force is “a” conservative force. “Spring force” is another conservative force. Is friction force a conservative force? If the work done by a force depends not only on initial and final positions, but also on the path between them, the force is called a non-conservative force.
Is gravitational force a non central force?
Gravitational force is a central force i.e., it acts along the line joining the centres of the two bodies.
Is gravity attractive or repulsive?
The force is attractive because the phenomenon is one of “accelerating together”. There is no way a repulsive force describes that. General Relativity is a better theory, but it has no gravitational force in it. It explains gravity as a result of how geometry works in the Universe.
What is a repulsive force that describes gravity?
There is no way a repulsive force describes that. Nobody knows … though the best theories do have a repulsive aspect to gravity on a cosmological scale. In general, gravity is the name we give to the phenomenon that things tend to accelerate towards each other when left to their own devices.
What is the evidence for gravitational repulsion?
There is also indirect evidence for cosmic inflation, which currently holds the record for gravitational repulsion. However it is true to say that the force between positive masses is always attractive, in contrast to electromagnetism where charges of the same sign repel.
What is the difference between gravity and gravitational force?
Answer Wiki. In general, gravity is the name we give to the phenomenon that things tend to accelerate towards each other when left to their own devices. 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).