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.
The pimple can happen on the back of the tongue, side and the tip. Pimple on Side of Tongue. Pimple that is on the side of the tongue, or lie bumps are very small, soft, white or even reddish tongue bumps that appear on the sides of the tongue. These seems swollen and are also painful. These comes up especially when the fungiform papillae which usually hosts the taste buds sometimes gets irritated.