Linked Questions

1
vote
1answer
54 views

How does the spacetime curvature cause an object to attract towards the ground? [duplicate]

An object moves at a constant speed relative to the local spacetime but due to the warped spacetime it appears as if accelerating. How does spacetime curvature exactly causes this effect?
2
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1answer
75 views

Why does a stationary object start moving if there is no force acting on it in general relativity? [duplicate]

I understand that gravity is not a force, but the function of curved space time. But what gets an object in motion if no force acts on it? For example, if I roll a ball, its path will curve towards ...
1
vote
3answers
204 views

Why do we fall towards earth and not hover during free fall as per General relativity? [duplicate]

So this is what I understand from General Theory of Relativity: A body freely falling towards earth's surface would be in an inertial frame of reference (air removed) with zero net force acting on it. ...
0
votes
1answer
121 views

In general relativity, what makes an object released in a gravitational field START to fall? [duplicate]

I understand why a released object moves as it does once it has started moving, and why all objects fall at the same speed, removing other effects. But I don't see why the curvature of space would ...
8
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1answer
1k views

What is gravitational energy in general relativity?

In GR the curvature of spacetime "is gravity". This curvature is expressed via the Riemann tensor (or the Ricci tensor + Ricci scalar). The curvature is connected via the Einstein Field Equations with ...
3
votes
3answers
186 views

If gravity is simply a curvature of space, why does it accelerate objects? [duplicate]

I understand how an object moving through space would be affected if gravity were a curvature of space as opposed to being a force. However, I do not understand why this creates a "pull" on an object. ...
0
votes
1answer
95 views

Why time is attached with space and how apple fall according to Einstein? [duplicate]

As per Einstein space is flexible it means it can be curved with mass but I am not able to visualize the relationship between space and time (space-time continuum). According to Newton Apple falls ...
0
votes
0answers
66 views

Is Earth flat according to Einstein? [duplicate]

I didnt understand how to apply general relativity to Earth. If there is no such a thing as gravity but spacetime bending. Can someone just show, send something to read how gravity works in Earth ...
2
votes
1answer
1k views

Gravity: Why Do things fall to Earth? [duplicate]

If gravity is in reality spacetime geometry why when I drop an object on the surface of the Earth does it fall to the ground? Does spacetime push it?
0
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1answer
123 views

General theory of relativity questions [duplicate]

I do not understand how this theory (the theory of general relativity) would work because gravity is what makes things heavy and weight is what bends things. All of the proof makes it hard to question ...
0
votes
0answers
48 views

Reason for gravitational force [duplicate]

What is the reason for the existence of gravitational force between two bodies? Why do we say it as an attractive force? What makes any two objects to attract each other?
0
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1answer
105 views

Shouldn't a cold object feel less gravity? [closed]

The premises for my question are, Gravity isn't a force but curved spacetime "If gravity isn't a force, how does it accelerate objects?" (complicated answer) If the answer below, to the question ...
-1
votes
1answer
52 views

Why does gravity pull me when I'm not moving?

My question is: Why does gravity pull me towards the earth? I get all the curved spacetime thing but when I'm sat here in my chair I'm traveling through basically the same spacetime as everything ...
4
votes
6answers
4k views

From where does gravity get its energy to do work upon an object?

For an object or force to do work, it needs energy. But, from where does the gravitational force get the energy to do work upon, say, a falling object? The gravitational force is doing work upon the ...
0
votes
1answer
165 views

How does gravity cause acceleration? Also what means spacetime? [duplicate]

Since gravity only curves spacetime, how does it give kinetic energy to an object eg when an object falls to the ground. Since it only curves spacetime we shouldn't move towards it without kinetic ...

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