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.
1 Foods that contain very high acid level may also lead to pimples on the tongue. 2  Pimples on tongue can be as a result of some kind of injury that occurs to the tongue brought about by scraping or biting.  Oral thrush or oral candidiasis â which is a yeast infection â can also lead to a pimple on tongue.