# Why is it that we can"t feel how fast the Earth is moving? [closed]

We are moving like 100,000 mph. And why do we not fall off going that fast

• I'm voting to close this question as off-topic because it is not about astronomy. – HDE 226868 Jan 11 '16 at 21:24

Because the rotation of the earth is very smooth and doesn't change, the centripetal acceleration we feel is very nearly constant. This means that the (small) centrifugal force from the rotation gets added to gravity to make up the "background force" we don't notice.

Taken from Physics SE.

You 'feel' only acceleration, not velocity. Acceleration is a change in velocity per time. The forces on the surface of Earth on a human are in equilibrium, and therefore the accelerations are too, thus we don't fall off.

Not only Earth is moving but also you with the rest like atmosphere, so you are in closed system. The edge of atmosphere does not fly off because it has nothing to rub against, it just stays in same speed. When you put your hand from the car and you feel the force against it, it is the force which you must make to push the air from your way. If the air would be moving at same velocity as you, your hand would not feel this and you would be able to hold outside of car even at 300km (do not do that, it is dangerous).