Earth spins at a constant rate. Think of the last time you rode a subway, train, or public transport. When it began to accelerate, you felt a force pushing you back. You felt this force because the speed is changing. However, after the train reached it's top speed, you stopped feeling this force. This is because both you and the train are moving at the same speed. When the train decelerated, you felt that force again, but in the opposite direction. This is because, once again, the speed of the train is changing, this time negatively. However, if you were to remove a window from the train while it was moving, you would get bombarded with wind and be pushed back.
Earth also has an atmosphere that covers and separates us from the void of space, and holds all of our inert gases down.
Now apply this logic to the leaves on a tree. The leaves don't spin because they are spinning along with the earth at a constant speed (like when you don't feel anything when a train is moving at top speed), and the leaves aren't ripped off the tree because they are protected by an atmosphere (like the window on a train)
Does that explanation make sense to you? Please let me know if I can clarify anything
