Smells like a troll.
Car is stopped at a red light, preparing to turn left. Light goes green and car "accelerates" at a rate that allows it to make the turn in... 3 months. You won't feel much acceleration. You will hear a lot of honking.
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spot a say: Because the change in velocity is so small. As we spin once in 24 hours our angular velocity in radians is 2 * pi / 24 radians per hour
= 2 * 3.14159 / 24
= 0.261799 radians per hour
= 0.261799 / 3600 radians per sec
= 0.00007272205 radians per sec
As it revolves around the sun the change in velocity is even smaller
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Howard L say: It seems the other responders never heard of centrifugal acceleration. Yes the earth is accelerating but centrifugal acceleration is so small compared to gravity you don't notice it.
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Mutt say: Because the Earth is NOT accelerating as it orbits the Sun. Acceleration is defined as a CHANGE in speed. The Earth is orbiting at a very constant speed, with such small changes that it is not noticeable, just as it is not very noticeable to be in a car and accelerate from 40 MPH to 41 MPH.
And as for change in direction, take a car, and drive in a one mile circle (circumference). Are you going to feel the change in direction? Not likely since it's such a large scale, and not a thing like taking a clover leaf interchange from a north bound highway to a west bound one. And the Earth travels 584 million miles around the Sun. Do you really expect to feel such a small change in direction as we orbit?
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John say: Equilibrium.
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Morningfox say: No, you can't always feel acceleration. You can't feel it if it is too small. Even if it is larger, constant acceleration feels just like weight.
The acceleration from the Earth motion around the sun is about 0.0006 g's. That's equivalent to a 65 kg person gaining or losing 4 grams on a daily cycle. There's no way you could notice that without special instruments.
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