page A28
problem 39
question:Why do astronauts experience a feeling of weightlessness in space? is there no gravitiy in space? explain your answer.
answer: Astronauts feel weighless in space because they are constanly falling. there is gravity in space but, because of the way the earth orbits, they are constantly going around the earth. and they are falling while going around. the same goes for any other planet. everything has some gravity but maybe not enough to hold someone, or something, down.
http://www.youtube.com/watch?v=coX1u2_KBsQ
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