| json_metadata | "{"app":"Musing","appTags":["Question"],"appCategory":"Question","appTitle":"What causes earth spin?","appBody":"<p>Really interesting. Yes, like the title at this time, Mr. Gaje will discuss why the earth rotates and what happens if the earth stops spinning. We go to the first question first, \"Why does the earth rotate?\"</p><p> Now you are spinning with the earth at a speed of about 1,700 km / h without trying. So fast the Earth must rotate to do a total rotation every day. But why don't you feel it? Your stomach feels chaotic when you spin around in a playground and it's a lot slower than 1,700 km / h. Let's look at the following.</p><p>1. The reason is the same as you can't feel that you're moving while you're on the train.</p><p> This phenomenon is known by physicists with the term \"reference frame\" or \"reference frame\". The term is almost the same as perspective. Someone standing on the train will have one perspective, or one frame of reference, while the person standing on the station platform has another frame of reference.</p><p> If you stand on the station platform, you will clearly see the surface of the station while it remains silent as the train passes. But from inside the train, you will feel like you are standing still while your surroundings are moving. From these two terms of reference, you feel like you are the one who remains silent. When on a train, the world seemed to move. When standing on the platform, the train moves.</p><p>2. The theory of the train frame of reference is tantamount to the earth and the universe, but with a larger scale, so we cannot feel the spin.</p><p> Just as someone stands on the station platform, if we look at the earth from the outer frame of reference, we will be able to see its rotation clearly. We can't feel the wind that hit us to be able to think how fast our \"container\" moves, because the air on the train and the atmosphere on earth moves at the same speed as us.</p><p> 3. There is one important thing that distinguishes between trains and earth, namely acceleration.</p><p> When the train brakes suddenly or accelerates its speed, we will feel the change of energy. So that at certain moments, we will feel that we are indeed moving.</p><p> Like the basic laws of physics, if the acceleration is zero, when the train moves at a constant speed, we will not be able to feel that the train is moving.</p><p>4. Fortunately the earth has never experienced the same thing with a train, where the acceleration is relatively always zero.</p><p> Be thankful that the earth always rotates at a constant speed, so we don't feel it moving. If the train brakes suddenly and you can fall, imagine what will happen if it is experienced by the earth. Through the surface of the earth we can realize that the earth rotates through cycles day and night, as well as moving stars. For us as if the universe is shifting, but for the frame of reference of the universe, the earth is spinning.</p><p> The earth rotates, or the cool term rotates, once every day. Day and night happens because the earth rotates. However, what causes the Earth to rotate? What started the rotation of the Earth? To get the answer, we need to track events billions of years ago: when our Solar System, including Earth, was formed.</p><p>At that time, our Solar System was still empty. The sun doesn't exist yet; Earth, Moon and other planets have not yet formed. There is only a stretch of clouds of dust and gas that float erratically in the sky. These dusts and gases attract each other because of the force of gravity so they rotate and shrink.</p><p> What happened later? Maybe you can guess what happens if you have done this experiment: you sit on a chair that can rotate with your legs sticking out, then ask your friend to rotate the chair. When spinning, fold your legs. The seat round will speed up!</p><p> Just like the experiment above, a collection of dust and gas rotates faster as they shrink. Over time, the Earth formed from dust and gas. Rounds when the Earth is still shaped and gas and dust don't just disappear but cause the Earth to rotate.</p><p> Maybe you think, this happened a long time ago. Why is the Earth still spinning until now?</p><p> Every rotating object tends to maintain its rotation.</p><p> For example, top, the top you play wants to keep spinning even though eventually the speed decreases and stops. The seat in the experiment above also wants to keep spinning. It's just that, their rotation over time is disrupted by various things, such as friction with the floor, soil, and so on.</p><p> Unlike the round seats and top,</p>","appDepth":2,"appParentPermlink":"fkujzuhd5","appParentAuthor":"ashleysha","musingAppId":"aU2p3C3a8N","musingAppVersion":"1.1","musingPostType":"answer"}" |
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