Instead, we remember that a weight is a force. So, we don’t have to worry about those things. The mass of the person and the Earth doesn’t change and neither does G. We want to know the weight of a person on the surface of the Earth compared to the weight of a person in the space station, there are some constants in the problem. Now to show you that gravity does exist on the space station, we can look up the numbers or we can be smart and set the problem up as a simple ratio. Remember that Newton’s law of gravity says that the force between two objects, in this case a person and the Earth, is equal to G times the person’s mass times the Earth’s mass divided by the squared distance between the person and the center of the Earth. The radius of the Earth is about 6,400 kilometers and the International Space Station orbits about 400 kilometers straight up, or at an orbital radius of about 6,800 kilometers. (Image: NASA/Public domain) Weight of a Person on Space Stations
#NO GRAVITY FREE#
Is there gravity inside the International Space Station? Then how do we explain what we see in the videos? There is gravity on the International Space Station, but astronauts appear to be weightless because both the space station and the astronauts are in free fall. That this is not even close to being true. By Don Lincoln, Ph.D., University of Notre Dame Video clips of astronauts on the International Space Station doing flips and all sorts of things makes it very clear that they are working in a place where there is no gravity.
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