Why don't I feel like I'm moving when going fast?

Factual Questions
1

I’m no physics expert, so here’s my question. If I set a goal to go 500mph (say in an aircraft), I will feel the acceleration all the way up to that point, but when the speed reaches up to 500mph and stays there, why don’t I feel it anymore? It’s like with driving, once I get to a certain MPH and stay with it constantly, my body no longer feels like it’s moving, until I brake. What is it about staying at the same MPH that makes it seem like nothing is going on. I’m sure the same thing goes for space travel as well. You can feel the G-forces up to 20,000mph, but when that speed is reached, you no longer feel the moving force. So if can you understand my question, help me understand what’s going on here. Thanks in advance.

2

If you aren’t accelerating then you aren’t subject to any net force, so there is nothing to feel.

Regards,
Agback

3

Because once you reach a constant velocity you are no longer experiencing any accleration. No acceleration means no net force, and hence no sensation of movement.

4

It’s all about Relativity. There is no such thing as absolute velocity. All velocity is relative.

5

In other words, there is no difference between travelling at a constant velocity and standing still (a constant velocity of zero.) Velocity can only be measured in relation to some other object. You are sitting still relative to the floor of the airplane, but the airplane is travelling at 500mph relative to the ground. The only observation you can make that tells you that you are traveling at a constant velocity is by observing other objects around you which may be moving away from or towards you. Even then, it is equally valid to say “I’m traveling away from New York at 500mph” as it is to say, “New York is traveling away from me at 500mph.”

6

A Chinese Taoist sage is out for a meditative walk. He is standing still while the earth passes slowly underneath him. He meets going past him from the opposite direction another Taoist sage, who is likewise standing still with the earth passing beneath him.

7

Cool. Thanks.

8

Bounce a basketball in the aisle of an airliner in flight.

From your perspective, the basketball is going up and down.

From the viewpoint of people on the ground, the basketball is racing sideways at 400MPH while going slightly up and down.

Who’s right?

(But the Earth’s surface is moving because Earth is rotating, and orbiting, and the sun is racing around the galactic center, etc. etc.)