Question about speed connection

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Discussion Overview

The discussion revolves around the relativistic effects of time and speed as experienced by observers on a spaceship and a planet, both moving at 50% of the speed of light. Participants explore concepts related to time dilation, relative motion, and the addition of velocities in the context of special relativity.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant describes a scenario involving three clocks, questioning the relationship between their times when one clock shows one second.
  • Another participant challenges the notion of time "freezing," asserting that time does not behave that way in relativity.
  • Concerns are raised about the clarity of the original question, particularly regarding the reference frames for the spaceship and planet.
  • Participants discuss the relativistic velocity addition, emphasizing that speeds do not add linearly, and clarify that moving at 50% of the speed of light does not imply reaching the speed of light.
  • There is mention of the relativity of simultaneity and how different observers can perceive time differently based on their relative motion.

Areas of Agreement / Disagreement

Participants express disagreement on the interpretation of time behavior in relativity, particularly regarding the concept of time "freezing." There is no consensus on the original question posed about the clocks.

Contextual Notes

The discussion highlights limitations in the original framing of the problem, particularly the lack of specified reference frames for the speeds mentioned. The complexity of relativistic effects is acknowledged but not fully resolved.

danielhaish
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TL;DR
Does it worked until the speed of light?
Lats say that i am moving on spaceship that moves 50% of the speed of light
And this spaceship is on a planet that moves in speed of 50% of the speed of light . And we have one clock on the spaceship ,clock number one, and on the planet we another clock,clock number two. And on difference system that static relative to the planet, we have one clock,clock number three.
So we have three clocks but the problem is that the time is freezing relative to clock number three and clock . number three is not freezing realtive to clock two witch is not freezing relative to click number so . we have two option for what the value of the clock two and three when clock number one is one secend
 
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danielhaish said:
So we have three clocks but the problem is that the time is freezing relative to clock number three and clock . number three is not freezing realtive to clock two witch is not freezing relative to click number so .

I can't figure out what question you are asking, but time is certainly not "freezing".
 
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danielhaish said:
Lats say that i am moving on spaceship that moves 50% of the speed of light/quote]Moving relative to what?
And this spaceship is on a planet that moves in speed of 50% of the speed of light
Again, moving relative to what?
If you mean that the planet is moving relative to you, and the ship is moving relative to the planet, and you are asking if that means that the ship is moving at the speed of light relative to you (##.5c+.5c=c##), then the answer is no. You can google for “relativistic velocity addition” to find the correct rule for adding speeds.

However, I suspect that you’re working from a more basic misunderstanding here. You’ve heard that “time slows down for a moving clock”, but that doesn’t mean what you’re thinking it does. Let’s take the simplest example: you and I are standing side by side on the surface of the earth. We synchronize our clocks, then you get into a rocket ship and fly away at .5c relative to me. You are moving relative to me while I am at rest relative to me; I say that your clock is running slow. However, we could just as well analyze the problem by saying that you are at rest while I and the Earth are moving at .5c in the other direction - and conclude that my clock is the one that is slow.
(Do not confuse this situation with the one in which you eventually turn around and return to the Earth so that we can compare our clocks side by side - that’s the twin paradox and it is pretty much unrelated to time dilation and you don’t want to take it on until you understand the simpler case in which you and I are just moving relative to one another in a straight line).

Both descriptions of the situation are equally right, and there is no contradiction between them. The apparent paradox (my clock is slower than yours and your clock is slower than mine) is explained by the relativity of simultaneity, something else that you should google for.
 
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danielhaish said:
Summary:: Does it worked until the speed of light?

Lats say that i am moving on spaceship that moves 50% of the speed of light
This is very confusing. There is no such thing as “moves 50% of the speed of light”. There is “moves 50% of the speed of light with respect to Earth” or with respect to a space station or with respect to whatever.

Any time you mention “moves” without mentioning “with respect to” or “relative to” then you have an incomplete thought.
 
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danielhaish said:
the problem is that the time is freezing

No, it isn't. In relativity, velocities do not add linearly, so 50% of the speed of light plus 50% of the speed of light does not equal 100% of the speed of light.
 

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