Why can't we feel Earth's circular motion around the sun?

We can't feel Earth's circular motion around the sun due to the principle of inertia and the lack of acceleration.

The Earth's motion around the sun is a perfect example of uniform circular motion, which is a type of motion in which an object moves in a circular path at a constant speed. According to Newton's first law of motion, an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force. This is known as the principle of inertia. Since the Earth's speed and direction are constant, there is no change in velocity, and hence, no acceleration. As a result, we don't feel the Earth's motion.

Moreover, we don't feel the Earth's motion because we, along with everything else on Earth, are moving with it. This is similar to how you don't feel the motion of a car when it's moving at a constant speed in a straight line. You only feel the motion when the car accelerates, decelerates, or changes direction. Similarly, if the Earth were to suddenly speed up, slow down, or change its direction of motion, we would feel it.

Another reason we don't feel the Earth's motion is due to the lack of a reference point. When you're in a moving car, you can look out the window and see the trees and buildings passing by, which gives you a sense of motion. But when it comes to the Earth's motion, we don't have a fixed reference point against which we can perceive our motion.

Lastly, the gravitational pull of the Earth keeps us grounded and prevents us from being flung out into space due to the Earth's motion. This gravitational force is so strong that it overcomes the centrifugal force that results from the Earth's rotation. As a result, we feel the force of gravity much more strongly than any effects of the Earth's motion.