In mechanics, a force is that which causes a change in velocity or, if you prefer, that which causes an acceleration. When more than one force acts on an object it is the net force that is important. Since force is a vector quantity, use geometry instead of arithmetic when combining forces.
Quick Answer. A crawling sensation felt on the skin may be caused by a condition called morgellons, according to WebMD. Common symptoms of morgellons include feeling like bugs are crawling on the skin, burning, itching and stinging sensations. In some cases skin sores may appear as well.
Itâs All in Your Mind. Ever get that creepy-crawly sensation, like bugs are slithering beneath your skin? For some people, the feeling is permanent. They complain that their skin is infested by insects or parasites â a condition they call Morgellons disease, but that dermatologists have long described as a delusion. Now a new study confirms that these perceived infestations do in fact have more to do with the brain than actual bugs.