A centripetal force (from Latin centrum center and petere to seek) is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path.
There are a number of things that can cause a whitish coating or white spots to develop on the tongue, including the f ollowing: 1  Leukoplakia. 2  Oral thrush. 3  Oral lichen planus.
In most cases spots on the tongue begin on the sides of the tongue and spread to the center of the tongue. In some cases spots will grow into a coating that covers the tongue. This can continue to grow to be quite thick if it is allowed to continue unchecked.