We don't feel the Earth's rotation because we are moving along with it at the same speed. The Earth completes one full rotation on its axis approximately every 24 hours, causing day and night cycles. Since we are part of the Earth's system and our bodies are also rotating with it, we don't perceive the rotational motion in the same way we might feel the motion of a moving vehicle or a roller coaster ride.
Our sensation of motion mainly comes from changes in velocity or acceleration. When we are in a moving vehicle or experience sudden changes in speed or direction, our bodies feel the effects of those changes, such as inertia or forces acting on us. However, the Earth's rotation is a constant and relatively smooth motion, so there are no significant changes in velocity or acceleration that would cause us to feel its rotation in the same way.
It is worth noting that some people might experience a slight sensation or awareness of the Earth's rotation, known as the Coriolis effect, under specific conditions. For example, long-duration travelers, such as astronauts or pilots, might develop a subtle sense of the Earth's rotation due to their exposure to different reference frames and their training in spatial orientation. However, for the majority of people on the Earth's surface, the rotation remains imperceptible.