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But they're not both inertial frames, i'd like to see you get to the moon without accelerating.Originally posted by zoodboog
The best way to summarise it is this, from Bob Emery's site:
Note the use of the word "relative".
Earth and rocket are both inertial frames since they have constant velocity. (given)
Since they are in inertial frames they don't know which one of them is *really* moving. Thus the Spaceship could be considered as standing still and Earth moving away from it.
Yep i know, and i agree that this is a dodgy question (in the exam, i changed answers 3 times), but to me, D seemed the 'most correct', even though as you said, it's general relativity and you can't use special relativity equations.Originally posted by walla
i'm not convinced that he is accelerating
i mean no-one here even knows how to calculate things taking general relativity into account
let alone it being in the syllabus
so i dunno how you can say "hence D", because 16.7 was an answer you (and I) got by calculating according to special relativity (the wrong way)
yeah, we have ND on our sides!!!Originally posted by ND
Yep i know, and i agree that this is a dodgy question (in the exam, i changed answers 3 times), but to me, D seemed the 'most correct', even though as you said, it's general relativity and you can't use special relativity equations.
general relativity is not in the course, and its beyond the course!!!Originally posted by walla
ND - what "general relativity equations" did you use????
umm that's exactly my point. ND is claiming that he got D by using general relativityOriginally posted by freaking_out
general relativity is not in the course, and its beyond the course!!!
I used that one i formulated in the 3rd year of my PhD.Originally posted by walla
ND - what "general relativity equations" did you use????
yeah, u gotta b einstein to use that.Originally posted by ND
I used that one i formulated in the 3rd year of my PhD.![]()
well thats bcoz, if u really think abt. the spaceship had to have accelerated to reach its 0.8c speed...so therefore it is not exactly a inertial frame of reference as such.Originally posted by walla
ok so you got d by using special relativity...but you claim that special relativity doesn't apply...how does that work?
Read the edit in my post above.Originally posted by walla
ok so you got d by using special relativity...but you claim that special relativity doesn't apply...how does that work?