This essay has been submitted by a student. This is not an example of the work written by professional essay writers.

Zero Gravity in Space: a Look at The Experience of Astronauts

  • Subject: Science
  • Category: Physics
  • Topic: Gravity
  • Page 1
  • Words: 622
  • Published: 11 December 2018
  • Downloads: 20
downloadDownload printPrint

Pssst… we can write an original essay just for you.

Any subject. Any type of essay. We’ll even meet a 3-hour deadline.

Get your price

121 writers online

Download PDF


A frequent misunderstanding by many people today is that astronauts experience zero gravity especially when referring to astronauts in space. Many believe astronauts are weightless in space and that justifies their ability to float and travel through space. However, physics has proven this statement inaccurate and astronauts only weight about 10% less in space. According to Cutnell and Johnson this state of “weightlessness,” is not actually weightlessness and in turn should be referred to as apparent weightlessness [1]. In physics the concepts that best describes apparent weightlessness is uniform circular motion, gravity and applied force. According to Yale Scientific without gravity everything would cease to exist and because all matter would fly apart. Gravity is everywhere and it is the most important force in space and affects all matter. The gravitational pull from Earth is responsible for the moon’s orbit, and this gravitational force causes planets to orbit the sun. Because gravitational force relies on two masses which can explain why objects freely float in space. The smaller the mass the left gravitation force it feels. The further the object is from the sun the weaker its gravitation force.

An object’s weight is equal to gravity and the force acting upon the object. “True weight,” which is determined by the equation W=m*g by a weighing machine or balance, the true weight is equal to the force that is exerted by the Earth on it.

An example, When the stone is suspended by a spring balance the weight is by the normal contact force between the spring and the stone. If a stone was placed on a weighing scale, the force of gravity or its weight is acting downward is the force. The upward normal force from any supported surface is called an apparent weight, which depends on motion of the object or person. In addition, this further explains that a person on space would possess nearly the same weight as standing on the ground.

Another example of astronauts experiencing zero gravity is a person being inside an elevator, when the elevator is still the equation weight is equal to mass times gravity and equal to the force (W=mg=N), when the elevator moves down mass times acceleration is equal to mass times gravity minus the force (ma=mg-N), and when the elevator moves in an up direction, mass times acceleration is equal to force minus mass times gravity (ma=N-mg), the weight remains the same. When the elevator is falling freely the weight is zero because mass times gravity is equal to mass times gravity minus the force (mg=mg-N).

Therefore the apparent weight depends on motion, during free fall the person and weighing machine fall with the same acceleration. Astronauts remain in free fall, the astronauts does not exert any force and experiences weightlessness. As aforementioned, weightless is experienced because the astronaut and the weighing machine are free-falling at the same acceleration, and movement contributes a huge portion in weightlessness.

In result, in regards to astronauts in space, their weight does not change. Due to free-fall the astronaut has no force to support its body because the astronaut is accelerating down at the acceleration of gravity. In other words, you still have weight in gravity even though at certain times you cannot feel it. Many believe that the force allows you to stand on the ground is your own force. However, it is the force from the ground or anything that lies under you that pushes you back up. If there is nothing beneath you then you are in continuous free fall. For example different accelerations of apparent weight can occur when you on a rollercoaster or plane because at certain points of time you are traveling upward and other times downward.

Remember: This is just a sample from a fellow student.

Your time is important. Let us write you an essay from scratch

experts 450+ experts on 30 subjects ready to help you just now

delivery Starting from 3 hours delivery

Find Free Essays

We provide you with original essay samples, perfect formatting and styling

Cite this Essay

To export a reference to this article please select a referencing style below:

Zero gravity in space: A look at the experience of Astronauts. (2018, December 11). GradesFixer. Retrieved November 30, 2021, from
“Zero gravity in space: A look at the experience of Astronauts.” GradesFixer, 11 Dec. 2018,
Zero gravity in space: A look at the experience of Astronauts. [online]. Available at: <> [Accessed 30 Nov. 2021].
Zero gravity in space: A look at the experience of Astronauts [Internet]. GradesFixer. 2018 Dec 11 [cited 2021 Nov 30]. Available from:
copy to clipboard

Sorry, copying is not allowed on our website. If you’d like this or any other sample, we’ll happily email it to you.

    By clicking “Send”, you agree to our Terms of service and Privacy statement. We will occasionally send you account related emails.


    Attention! This essay is not unique. You can get a 100% Plagiarism-FREE one in 30 sec

    Receive a 100% plagiarism-free essay on your email just for $4.99
    get unique paper
    *Public papers are open and may contain not unique content
    download public sample

    Sorry, we could not paraphrase this essay. Our professional writers can rewrite it and get you a unique paper.



    Please check your inbox.

    Want us to write one just for you? We can custom edit this essay into an original, 100% plagiarism free essay.

    thanks-icon Order now

    Hi there!

    Are you interested in getting a customized paper?

    Check it out!
    Having trouble finding the perfect essay? We’ve got you covered. Hire a writer

    Haven't found the right essay?

    Get an expert to write you the one you need!


    Professional writers and researchers


    Sources and citation are provided


    3 hour delivery