Objects in Space: Does Microgravity Change the Rules?

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Discussion Overview

The discussion revolves around the effects of microgravity on the interactions between objects in space, specifically whether the rule that objects moving at the same speed and line do not harm each other applies in a microgravity environment.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions whether the rule about objects not causing harm to each other when moving at the same speed and line holds true in microgravity, suggesting that some objects may still be damaged.
  • Another participant asserts that if two objects are moving at the same velocity, they are not converging and thus cannot damage each other, but notes that gravitational attraction could cause their paths to converge or lead to orbital interactions.
  • A later reply indicates that significant mass is required for gravitational forces to be comparable to electric forces, suggesting that smaller objects, like rocks, would not coalesce in the same way that larger masses might.

Areas of Agreement / Disagreement

Participants express differing views on the applicability of the rule in microgravity, with some asserting it holds true while others suggest exceptions based on mass and gravitational forces. The discussion remains unresolved regarding the specifics of these interactions.

Contextual Notes

There is uncertainty regarding the conditions under which gravitational forces become significant compared to other forces, and the exact mass thresholds for different types of objects are not defined.

oumaima1
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Hello ,i was reading a physics book and a question came up to my mind,i'm a high school student..About the rule : If objects are moving in the same speed and line,they'll cause no harm to each others..Is this rule the same in microgravity? I suppose some objects will be damaged..:)
Thank you in advance,
Have a nice day,
Ps:sorry ,for my weak english skills!
 
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Hi and welcome.
If two objects are moving at the same velocity then they are not (by definition) converging so they cannot damage each other. If they have mass then they will have a finite attraction force between them and their paths will converge or they may actually orbit each other, depending on the exact circs..
Is that what you refer to as "micro gravity"?
Could you refine your question please? (Your English skills are quite OK! God you should see some of the sloppy posts some lazy people hit us with.)
 
I meant with ''micro gravity'' the outer space :) , I got your answer..
Yes,that's what i was refering..
Thank you very much ,Sophiecentaur..^^
 
Objects need to be very massive before the gravitational forces are significant compared with the electric forces that give them strength. Two small planets would eventually coalesc but two rocks never would. I'm not sure where the crossover lies. . . .
 

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