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They feel weightless because they are indeed weightless when in orbit, in effect in freefall. Gravity tries to pull them down but the spacecraft motion carries it "past the planet" in an arc that is part of a circular or elliptical orbit. If the spacecraft slows down, it will be pulled toward the Earth by the considerable gravitational force.
If an astronaut tries to use an ordinary scale to measure her weight, all attempts will be useless. The vessel she is in is under the influence of Earth's gravity, it is true, as is her body. But the vessel and her body are in the same orbit, at the same velocity. If she is motionless at the center of the vessel, no unbalanced forces will push her "down" toward the floor or hull of the vessel. And if there are some unbalanced forces, they are so small as to be negligible for all practical purposes. She will not be able to 'step' onto a scale, unless she is in some kind of rotating vessel, which would provide a kind of artificial gravity.
What else can I help you with?
What does weightlessness mean?
Weightlessness is the effect that astronauts enjoy in space.
A sentence using the word weightlessness?
In space, there is no gravity and one would experience weightlessness.
What are two examples of weightlessness?
Astronauts experiencing weightlessness in space due to the lack of gravity. Skydivers experiencing a sense of weightlessness during free fall before their parachute opens.
How Do Astronauts Cope With Weightlessness in space?
Astronauts cope with weightlessness in space by exercising regularly to maintain muscle and bone strength, using special equipment for daily tasks, and by taking medications to counteract the effects of fluid shift in their bodies. They also undergo training before the mission to adapt to the sensation of weightlessness.
What are two ways astronauts on the space shuttle combat the effects of weightlessness?
by eating and digesting
Why do astronauts in orbit feel weightlessness?
they are falling through space around earth
What does weightlessness?
Weightlessness is the effect that astronauts enjoy in space.
What does weightlessness mean?
Weightlessness is the effect that astronauts enjoy in space.
A sentence using the word weightlessness?
In space, there is no gravity and one would experience weightlessness.
How do astronauts describe the position of objects in space?
Weightlessness.
How do you put weightlessness in a sentence?
In space, there is no gravity and one would experience weightlessness.
How do you experience weightlessness on earth?
You can approximate weightlessness in a swimming pool. NASA astronauts practice maneuvers under water.
What are three way astronauts exercise in weightlessness?
they play football
Where does the comma go in the sentence if astronauts don't exercise in space weightlessness eventually causes there muscles to shrink?
If astronauts don't exercise in space, weightlessness eventually causes there muscles to shrink?
What are two examples of weightlessness?
Astronauts experiencing weightlessness in space due to the lack of gravity. Skydivers experiencing a sense of weightlessness during free fall before their parachute opens.
What is a sentence for weightlessness?
The weightless astronaut landed on Mars, which has no gravity.
Through the work done by astronauts during shuttle missions scientist learn the effects of weightlessness on?
The effects of weightlessness on humans is explored during the work done by astronauts. This helps with advancements in medical and technological fields.
