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.
This condition also causes smooth and tiny black spots on tongue. The spots may be slightly elevated above the tongue surface. Oral fibroma is non-cancerous and they can develop on different parts of your mouth including inside the cheeks, on roof of your mouth and under the tongue.