Why don't we feel the centrifugal force of Earth's revolution around the sun?

submitted by [deleted] from self.Physics

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[–][deleted] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (5 children)

I understand what you are saying, only a little bit.

I would have to look all this up:

Principal of Relativity

Makes sense

Circular or Elliptical Motion

I know nothing

Centripetal Acceleration

If it’s one constant speed, why are we accelerating. This doesn’t make sense to me.

pseudo forces

I don’t know anything about this.

which natural phenomenon are cause by them.

I don’t know, I dont know anything about them.

rotation, Coralis forces; asking about revolution

I know nothing.

Here’s what I do know:

We have GPS. We have airplanes. We have cellphones. We have satellite imagery. Why are they lying to us?

I’m happy to have a conversation about these things. I’m willing to keep an open ear. And I know about the glass dome theory. Like the firmament? Or what’s it called, in the Bible?

Feel free to share what you know. I often look stuff up in google and don’t require citations. I love to learn.

But I am very skeptical of flat earth and the dome.

[–][deleted] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (3 children)

Since velocity is a vector (has both direction and magnitude) going at constant speed in a circle means you are always changing the direction, hence the velocity. So it is accelerating.

I’m not a flat earther, but the intuition contradicts the math. If we went by intuition we would wonder what holds the atmosphere together.

[–][deleted] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (2 children)

Magnetism? Gravity? What does hold in our atmosphere?

This is over my head.

What is your point? Like what are we getting at?

[–][deleted] 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (1 child)

That your mistake was assuming I am a flat earther because I asked this question.

[–][deleted] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

That’s fine.

But what are we getting at?

[–]weavilsatemyface 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

If it’s one constant speed, why are we accelerating.

It takes a force to either change speed, or change direction. That force causes an acceleration. So even if the speed is the same, there is an acceleration. We call speed + direction "velocity" so any change in velocity (whether the speed, or direction, or both) counts as acceleration.

pseudo forces

I don’t know anything about this.

There are real forces, like friction, gravity, magnetism, tension, pushes and pulls; and then there are pseudo forces. For example, when you are in a car travelling at high speed, and you turn left, you will feel a force pushing you to the right. This is a pseudo force, because it's not real. There is a real force on the car, pushing it to the left (the friction on the tires). The force pushes the car to the left. But people and objects inside the car want to keep travelling in a straight line. So from their perspective, it feels like something is pushing them towards the right side of the car. But that's just an illusion -- its actually that the car is moving to the left while they are moving forward.

Good demonstrations of why centripetal forces are real but centrifugal forces are fictitious or pseudo forces: