Why we cannot feel the Earth spinning?
Science & Tech / /
In order to make a complete rotation, the Earth is spinning at about 1,000 miles an hour. But how comes that nothing makes us aware of it?
Even though we feel dizzy after spinning around with a speed way slower than 1,000 miles per hour, we still are not aware of the Earth spinning, though we are standing on it. The reason behind this is the same reason we don’t feel we are moving when traveling by train. In the language of physics this is called “frames of reference,” which can be explained kind of like perspectives. A person standing on a station platform has one perspective, while a person standing on a train has another.
If you were often present on physics lectures you must remember the teacher explaining: If you are standing on the station platform, observing the train you would clearly notice that you are standing still, while the train is moving. But the passengers have the same perspective—they are standing still, while the station platform is moving.
The same can be applied for Earth and space, only at bigger scales. From inside the Earth we don’t feel we are spinning. But if we could observe Earth from the space, we would be able to notice it instantly.
Only there is one difference between Earth and a train. When a train changes the speed, we can feel the resulting force on our bodies. According to the law of physics: mass x acceleration = force, where our body is the mass, and when there is 0 acceleration—a constant speed—we can’t feel any force on your body. But when as the train speeds up or slows down, there’s a force, which if we'restanding up, might easily knock usover.
The case with Earth is quite different for a simple reason—it doesn’t ever slow down or speed up, which makes us unaware that we are standing on a surface that is spinning with about 1,000 miles per hour.
Still that doesn’t mean we can’t observe the Earth spinning from the ground. The Sun and Moon rise in the east and set in the west. But that’s just our perspective. From the Sun’s point of view, we’re the one spinning in circles.
source: popular sicence