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Rockets (2 Viewers)
- Thread starter ozc
- Start date
Takuya
Banned
Who cares now!!!
freaking_out
Saddam's new life
i guess the guy won'ts to b a rocket scientist.
Takuya
Banned
If he really wants to know...
Law of Conservation of Momentum...
Initial mass x initial velocity = final mass x final velocity.
As fuel burns, mass decreases, hence velocity must therefore increase to conserve momentum. Therefore increased accelerations put more force on astronauts, and you can calculate g-force and all that sort of thing from there...
Law of Conservation of Momentum...
Initial mass x initial velocity = final mass x final velocity.
As fuel burns, mass decreases, hence velocity must therefore increase to conserve momentum. Therefore increased accelerations put more force on astronauts, and you can calculate g-force and all that sort of thing from there...
freaking_out
Saddam's new life
yeah, he's prolly a punny little prelim. kid tryin' to get ahead in his work.
Rahul
Dead Member
lol yeh probably, but even then it could be a late night crammer, like me
hmm...the only thing i would add to takuya would be that F=ma. where force(thrust) is always a constant. therefore, as mass is burnt off, acceleration would have to increase. balancing out = energy conservation.
although, acceleration also means g-forces for astronauts, so they woudl have to control the acceleration of the ship. ie- turning off the engine, etc.
hmm...the only thing i would add to takuya would be that F=ma. where force(thrust) is always a constant. therefore, as mass is burnt off, acceleration would have to increase. balancing out = energy conservation.
although, acceleration also means g-forces for astronauts, so they woudl have to control the acceleration of the ship. ie- turning off the engine, etc.
...
^___^
physics is OVER!!
OVER I TELL YA!!!!
OVER I TELL YA!!!!
freaking_out
Saddam's new life
yeah, get that into ya heads ppl.
Constip8edSkunk
Joga Bonito
there are 04ers here too....
edit: to add to what takuya and rahul has said, you might also need to talk about how g-forces affect astronauts, ie why they lie down...
edit: to add to what takuya and rahul has said, you might also need to talk about how g-forces affect astronauts, ie why they lie down...
Last edited:
Rahul
Dead Member
"the only thing i would add to takuya would be that F=ma. where force(thrust) is always a constant. therefore, as mass is burnt off, acceleration would have to increase. balancing out = energy conservation." did you read this?
check out the relevant section in the text book, it will show you the momentum of gases and rockets bit aswell.
check out the relevant section in the text book, it will show you the momentum of gases and rockets bit aswell.
freaking_out
Saddam's new life
have u tried hsc.csu.edu.au?
Constip8edSkunk
Joga Bonito
m1v1=m2v2... but m2 decreases so v2 increases... now just bullshit about this as u invariably do in physics