क्यों विज्ञान 0 gravity को नहीं खोज पाया | Weightlessness | Free fall | Microgravity

Hello everyone have you ever seen the images or videos of the astronaut inside an international space station if yes then you have wondered how they were floating inside it and can do various activities which we cannot do on earth many of us thinks that the reason of weightlessness is the zero gravity of the space but wait there is no place in the universe where we will found zero gravity. Weightlessness is something many of us have dreamed about since we were kids. To understand the concept of weightlessness we have to first understand about the weight. Our weight on Earth depends on our mass, which is how much matter we are made of, as well as the force of attraction between our mass and the mass of planet Earth. This attractive force, more commonly known as gravity, is a non-contact force that acts on us from a distance. As the name implies, a non-contact force is one that acts between two objects that are not in physical contact with one another, meaning that we need not be touching Earth for gravity to be acting upon us. In fact, we do not feel the force of gravity unless there is some opposing contact force to counteract it. This opposing force is termed normal force, which in contrast to gravity, is a contact force that acts upon objects that are physically associated with one another. So what does this mean for orbiting astronauts? In space, astronauts and their spaceship still have mass and are still acted upon by Earth’s gravity. However, they do not feel their weight because nothing is pushing back on them. In essence, the ground has disappeared from beneath them, and both the astronauts and spaceship are falling .Wait, so weightlessness is just free fall? Yes. Free fall is defined as “any motion of a body where gravity is the only force acting upon it.” In the vacuum of space, where there are no air molecules or supportive surfaces, astronauts are only acted upon by gravity. Thus, they are falling towards Earth at the acceleration of gravity. This begs the question: how are spaceships able to stay in orbit, rather than falling back towards Earth’s surface? Although gravity pulls astronauts towards Earth, the spaceship is traveling so quickly in the forward direction that it ends up orbiting around the earth in a circular pattern, much like a ball swinging at the end of a string.
Now to know more about weightlessness watch this video till the end.
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Видео क्यों विज्ञान 0 gravity को नहीं खोज पाया | Weightlessness | Free fall | Microgravity канала Science and myths