Gravitational Force on a Body: Is it Absolute?

In summary, the concept of absolute force in GR is defined by proper acceleration, which takes into account all real and fictitious forces. Coordinate acceleration, which is not absolute, is produced by fictitious forces. Therefore, gravity is not considered a force in GR, but rather a result of curvature caused by other sources of acceleration.
  • #1
skanda9051
24
0
Can we consider gravitational force acting on a body considered as absolute force:-) if so pleas explain
 
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  • #2
Please define your meaning of 'absolute force'.
 
  • #3
In GR, accelerations are absolute, so any force can be measured absolutely, including fictitious forces, such as gravity.
 
  • #4
K^2 said:
In GR, accelerations are absolute, so any force can be measured absolutely, including fictitious forces, such as gravity.

Can you explain more? I agree with the first part. To me, that means, in GR, there is no such thing as fictitious forces, and gravity is not a force at all. Any proper acceleration is due to a real, non-gravitational source (EM, etc), reflecting deviation from inertial motion, latter determined by stress/energy=curvature.
 
  • #5
K^2 said:
In GR, accelerations are absolute, so any force can be measured absolutely, including fictitious forces, such as gravity.
The kind of acceleration which is absolute is called proper acceleration. Coordinate acceleration is not absolute, and fictitious forces produce coordinate acceleration, not proper acceleration.
 
  • #6
Ugh. Don't know what I was thinking. Disregard my previous post.
 

Related to Gravitational Force on a Body: Is it Absolute?

1. What is gravitational force?

Gravitational force is the attractive force that exists between any two objects with mass. It is responsible for keeping our solar system and other celestial bodies in orbit.

2. Is gravitational force absolute?

Yes, gravitational force is considered to be an absolute force. This means that it acts on all objects with mass regardless of their location or speed.

3. How does the mass of a body affect gravitational force?

The greater the mass of a body, the stronger its gravitational force. This is because mass is directly proportional to the force of gravity between two objects.

4. Does distance affect gravitational force?

Yes, the force of gravity decreases as the distance between two objects increases. This is described by the inverse square law, which states that the force of gravity is inversely proportional to the square of the distance between two objects.

5. What is the formula for calculating gravitational force?

The formula for calculating gravitational force is F = G * (m1 * m2)/d^2, where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two objects, and d is the distance between them.

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