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.
White spots on the tongue or in the mouth can be an advanced symptom of HIV/AIDS. Those experiencing this symptom should see a doctor immediately. A white spot or patch can be symptomatic of chlamydia, gonorrhea, HIV, or AIDS and are characterized by an area of thickening in the lining of the mouth that has produced a white appearance.