Linked Questions

2
votes
1answer
73 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
186 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 ...
0
votes
0answers
60 views

It is about spacetime and Gravity [duplicate]

if the gravity is the curvature in Spacetime due to this the earth revolves around the sun so does the curvature of spacetime applies force on the earth to move around the sun?
3
votes
3answers
179 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
64 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 ...
0
votes
1answer
119 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
votes
1answer
104 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 ...
0
votes
1answer
157 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 ...
0
votes
2answers
135 views

A problem with how curved spacetime explains gravity [duplicate]

I've read quite a few online explanations of how curved spacetime is the reason objects are drawn to each other, and that gravity is an illusion. Most of them follow the same path: explain what ...
0
votes
1answer
125 views

How can a particle following a geodesic accelerate?

A particle following a geodesic moves by inertia. Yet typically, we think of movement by inertia as moving at some constant velocity. But a particle in free fall does 'accelerate' i.e. its velocity ...
9
votes
3answers
1k views

Can you derive new theories in physics by only looking at the math?

Can you develop new theories in physics by only looking at the maths from past physics concepts? Or does observation of physical reality or converging of physical concepts ALWAYS come first before the ...

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