Why Can't We Feel the Movement of the Earth?

When we ride in a smooth car or ship, we cannot feel it moving. But when we look out, we feel the objects outside are moving backwards. The faster the car, the faster the objects move backwards. As the earth has gravitation, we are firmly attracted by it. Besides, the earth is very big and turns very smoothly, we cannot feel its movement. But everyday when we see the sun, the moon and stars rising from the east and setting in the west, then we know that the earth is turning from the west to the east.