If You Follow The Straightest Possible Path Through A Spacetime Diagram

You are in free fallyou do not feel any weight or acceleration in a saddle shaped geometry what do the angles in a triangle add up to. C earth and the sun are connected by a ropelike set of invisible subatomic particles.

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How does gravity affect time.

If you follow the straightest possible path through a spacetime diagram. A freefalling object then follows the straightest possible path in spacetime. Gravity arises from curvature of spacetime. Now a straight line takes me from the roof to the ground.

Around a black hole spacetime becomes so curved that nothing can escape. They are following the straightest possible paths through space time but those paths happen to meet. What is a black hole.

What is a spacetime diagram what is a worldline what. So the diagram curves. You must be traveling at the speed of light you get from one place to another as fast as possible you are in free fall you do not feel any weight or acceleration.

The mass of the sun causes spacetime to curve so freely moving objects such as planets and comets follow the straightest possible paths allowed by the curvature of spacetime. Any time you are traveling through space at constant speed any time your worldline is perfectly straight any time your worldline is following the straightest possible path through spacetime any time you are very far from any planet you can never be truly weightless. Time runs more slowly at lower altitudes in a gravitational field.

You will be weightless. B the mysterious force that we call gravity holds earth in orbit. You must be accelerating.

If we turn off gravity i just floattracing a straight line in this diagram. 1 you look at the bright star vega that is 25 light years away. A earth is following the straightest path possible but spacetime is curved in such a way that this path goes around the sun.

Follow me back to the roof. If you follow the straightest possible path through a spacetime diagram. Spacetime becomes highly curved around a large mass compressed into a tiny space.

Suppose the room in which you are sitting was magically transported off the earth and sent accelerating through the universe at 98 ms2. None of the above. Earth is following the straightest path possible through spacetime but this path happens to go around and around the sun.

If your wordline is following the straightest possible path through spacetime then. Circles that were evenly spaced in flat spacetime become more widely spaced near the central mass.

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