Recent content by LM542

I imagine gravity works similar to a treadmill and my question is based on the same assumption Imagine a very very long treadmill with a person on it. The treadmill starts and the person moves to the right. But the treadmill has wheels and drives faster to the left. The person now moves to the...

When a spaceship accelerates to 1.000 kmh, the effect of time dilation is tiny. But what happens if this spaceship accelerates in an inertial frame whose total speed is much slower or whose time goes much faster, will the time dilation effect be the same? If the spaceship travels in a inertial...

I have no clue about mathematics, so I can't confirm it. Has this ever been observed in reality, could you please show me a proof or how this scenario is called, so that I can look it up.

And what if I relocate point B far more away, so that planet is now closer to point A? According to you the affected object will now lose the race?! Does that mean that escape velocity is less than the entry velocity?

A better analogy: There are two runners who run together at 10 kmh, one of them suddenly accelerates to 20 kmh and then reduces to 10 kmh. The both continue to run with 10 kmh to the finish line. Will both come at the same time to the finish line. The first ran exactly at 10 kmh, the second ran...

Two objects travel from point A to B. They start with the same speed. 1. The first object travels without any obstacles from A to B. 2. The second object encounters at the middle of the course a planet without an athmosphere. The planet has a tunnel (don't ask why) through which the object...

@PeterDonis: 1. Doesn't the time slows down for the object? The closer the object comes to the Earth the slower it's time goes, so shouldn't the remote observer see a constant motion? 2. Does gravity even have a time dilation effect on matter that's not giving into gravity? The time of an...

When an object is flying to the Earth and it's increasing it's speed through gravity, does a remote observer see this increase of speed too, or will he see the object moving at a constant speed? And another question: Is there any time dilation by the remains of an object that hits a planet...

What do you exactly mean with "stops"? When the acceleration stops or when the rocket reaches the point when it falls down back on the planet.

Let's say we are on Earth-like planet, but without an athmosphere. There's a rocket on the ground and it's starting now. The rocket accelerates but at a point when it has enough speed it stops accelerating. The rocket has still enough speed to get further away from the planet but not enough to...