AmirShahzad.PK Posted July 29, 2015 Posted July 29, 2015 I do not know much of Astronomy but this felt a interesting question to me posed by my cousin. My cousin wanted me to think on it but I enjoy and prefer discussions more than just doing it alone. As far as I know, when we walk or run on earth, we apply force against gravity. I read Newton`s third law of action and reaction in my School and college and that also applies here but I want to keep it simple. Also, jet rising up from the earth also work against gravity. All of these requires force against gravity but is this possible to reduce or even finish this gravity. I am not talking about doing this to the whole earth but some thing like a person wearing a specific clothes or something else do not get affected by gravity? Share your ideas about it. What would happen to such person who is not affected by gravity at all. Will he be able to stand on earth or will be attracted by other bodies in our galaxy? Or he will be able to jump high like people did in the moon.
ACG52 Posted July 29, 2015 Posted July 29, 2015 No,gravity does not wear off or diminish by use. It doesn't get used up.
ajb Posted July 29, 2015 Posted July 29, 2015 ... something else do not get affected by gravity? This is the problem. As far as we know everything gets effected by gravity.
Endy0816 Posted July 29, 2015 Posted July 29, 2015 (edited) Think of gravity as mass coming together resulting in a lower energy configuration. You have to do work to move away from another mass. But as you move towards another mass, negative work is done(ie. you can swipe kinetic energy from something falling). You could get away from most gravitational influences(exception would be your own mass). You would be a bit on the lonely side though. Edited July 29, 2015 by Endy0816
AmirShahzad.PK Posted August 17, 2015 Author Posted August 17, 2015 No,gravity does not wear off or diminish by use. It doesn't get used up. OK but if suppose an ideal situation then what will happen to the body experiencing no gravitational force? This is the problem. As far as we know everything gets effected by gravity. Yes but if suppose an ideal situation then what will happen to the body experiencing no gravitational force?
ACG52 Posted August 17, 2015 Posted August 17, 2015 (edited) OK but if suppose an ideal situation then what will happen to the body experiencing no gravitational force? Yes but if suppose an ideal situation then what will happen to the body experiencing no gravitational force? Your question doesn't really make much sense. The astronauts in the space station spend up to a year in free fall, experiencing no gravity with no ill effects. Edited August 17, 2015 by ACG52
Acme Posted August 17, 2015 Posted August 17, 2015 Your question doesn't really make much sense. The astronauts in the space station spend up to a year in free fall, experiencing no gravity with no ill effects.Not so. Weightlessness and Its Effect on Astronauts Not having to bear weight on your feet sounds relaxing, but in the long term there are many health problems associated with it. Bones and muscles weaken, and other changes also take place within the body. ... Temporary health effects Weightlessness causes several key systems of the body to relax, as it is no longer fighting the pull of gravity. Astronauts' sense of up and down gets confused, NASA said, because the vestibular system no longer can figure out where the ground and the ceiling are. Spacecraft designers take this into account; the ISS, for example, has all of its writing on the walls pointing in the same direction. Crewmembers also experience a disruption in their proprioceptive system, which tells where arms, legs and other parts of the body are oriented relative to each other. ... Long-term health effects Astronauts in space for weeks to months can run into trouble. Calcium in bones secretes out through urine. As the bones weaken, astronauts are more susceptible to breaking them if they slip and fall, just like people with osteoporosis. Muscles also lose mass. ...
ACG52 Posted August 17, 2015 Posted August 17, 2015 Yeah, I know. I was just trying to keep simple for a poster who doesn't really seem to have clue.
Acme Posted August 17, 2015 Posted August 17, 2015 Yeah, I know. I was just trying to keep simple for a poster who doesn't really seem to have clue. I don't understand how misinformation keeps thing simple.
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now