heeyy heepl please (1 Viewer)

[shantu1992]

1. identify why there exists an ''entry corridor'' for the space shuttle returning to earth

2. why do astronauts feel ''weightless'' in space? How can tehy prove they do have weight?

thanks heapps

 

[chumbumm. =D]

they feel weigthless cos of the lack of gravity?

idk.

 

[shantu1992]

its so basic
just need as much info as i can get

 

[chumbumm. =D]

ask mr google!
he noes EVERYTHING!
=D

 

[shantu1992]

haha nah u cant trust google

 

[savio23q]

You trust teenage kids (most of which haven't finished school) more than google? :|

I would trust google more man.

 

[shantu1992]

You trust teenage kids (most of which haven't finished school) more than google? :|

I would trust google more man.

nah u need a variety of sources
ofcourse i looked on google

 

[Pwnage101]

1. identify why there exists an ''entry corridor'' for the space shuttle returning to earth

2. why do astronauts feel ''weightless'' in space? How can tehy prove they do have weight?

thanks heapps

1) this is 5.2-7.2 degrees to the horizontal - any steeper and the astronauts will feel to much g-force and shuttle will burn up, while too shallow and the spaceship will 'bounce off' the atmosphere, back into space

2) because they are falling towards the earth at the same rate as their surroundings (contrary to popular beliefe there is still quite a high value for g, acceleration due to grqavity, which can be worked out by g= (GM)/(r^2), and u'll fin its like 4-7m/s^2 in space (dependin on altitude of orbit) - this is misunderstood by many students, and thats why u put 'weightless' in inverted commas, becaus eit is only APPARENT WEIGHTLESSNESS, cause they still have a weight (probs 50-80% of their weight on surface of earth)

any good textbook will have this info

 

[cutemouse]

1. There is an entry 'corridor' because if the angle is too steep, then the spacecraft will burn up, and if it is too shallow, then the spacecraft will 'skim' back into space.

2. Astronauts feel weightless because they are in free fall, ie there is no reaction force acting upon them.

 

[shantu1992]

thanks all
appreciate it