Typically, an astronaut and their vehicle are in free fall around the Earth (orbit). This feels like going down a big hill on a roller coaster, but it doesn't stop until reentry.
If you sat on a weighing scale while riding a roller coaster, you would see your weight change with changes in momentum as the roller coaster climbed, fell, banked etc.... Say you normally weigh 150lbs, when you're climbing up the big hill, the scale would show you weighing more than 150 (your weight plus the acceleration as you gain altitude). When you crest the hill and plummet downward, the scale will read much less than 150lb, as your seat, the scale & YOU fall back towards the ground.
Likewise, an astronaut sitting on scale would weigh more than normal during lift off and climbing to orbit. Typically, astronauts will weigh 2-4 times their normal weight during this time. Once the spacecraft is in orbit, it is in continuous free fall around the Earth. The scale would read "0" (zero).
when the rockets stop firing, astronauts begin free fall (weightless).
they have to exercise their muscles wherever they are.
You get to experience living in space, floating around in a weightless environment, and viewing the earth from a third party perspective. Astronauts are viewed as the elite, and are often highly respected.
Your mass is the amount of matter that contains, it is your weight that will differ due to gravity. The astronaut still has the same amount of matter whether he be on earth, in space, or on the moon, though due to the different strenghts of gravity he will weight the most on earth, 1/6th of this on the moon, and be weightless in outer space.
The force of gravity on Earth for this astronaut is 50 x 9.8 = 490 Newton. Divide this by 5.6 squared, and you get 15.6 Newton.Note that the astronaut will not feel this force, because he is in free fall; any space capsule he is in will accelerate towards Earth with the same speed as him, and he will feel weightless.
Yes
yes
when the rockets stop firing, astronauts begin free fall (weightless).
they have to exercise their muscles wherever they are.
They actually are weightless, due to the fact there is no gravity in space. However a sky-diver would say he/she feels weightless, but they are experiencing free-fall.
He (or she) must float motionless and unattached to any object or cable.
Technically, as an astronaut is weightless in space, so should a space shuttle!
because both the astronaut and the satellite is attracted towards the center of the earth
It actually means that the astronaut is in free fall, and doesn't FEEL gravity. Gravity does affect the astronaut, so the astronaut will still be accelerated towards Earth. However, the astronaut won't feel the gravity.
ahahah nica sorry but i dont answer questions for ugly as people
The weightless astronaut landed on Mars, which has no gravity.
Yes