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Physics
Special and General Relativity
General Relativity & Gravity: Exploring the Conundrum
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[QUOTE="Mohammad Hunter, post: 6007589, member: 619526"] So the other day I saw a YouTube video on how gravity works according to general relativity. From what I understand, objects bend space_time with their mass and create a shape which is close to a cone. Since objects only move forward in time through a straight line, the bent space_time makes the objects fall on each other. But my question is: when you create a cone and draw a straight line on it, the line starts from a lower level, goes up and down again( I'm talking about the lines Einstein had in mind) which creates a problem... In the model, all objects start from what looks like the peak and descend down. I don't understand two things: 1. The heavy object is located on the peak of the cone( right?) And when the straight line is followed, it does get close to the massive object but passes through and starts wandering away( to make it easier I assumed one object is not massive enough to effect the other here) 2. Don't both objects travel with the same speed through time?( Specially when the two objects have the same mass) If so, they should be staying still from each other's perspective.( Their relative velocity is zero) So while the objects are moving forward in time, the cone is moving forward with them. So no fall should be expected. [/QUOTE]
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Physics
Special and General Relativity
General Relativity & Gravity: Exploring the Conundrum
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