In economics, physical capital or just capital is a factor of production or input into the process of production, consisting of machinery, buildings, computers, and the like. The production function takes the general form YfK, L, where Y is the amount of output produced, K is the amount of capital stock used and L is the amount of labor used. In economic theory, physical capital is one of the three primary factors of production, also known as inputs in the production function. Blood: The Last Vampire Cartoon Divx there. The others are natural resources including land, and labor the stock of competences embodied in the labor force. Physical is used to distinguish physical capital from human capital a result of investment in the human agent, circulating capital, and financial capital. Physical capital is fixed capital, any kind of real physical asset that is not used up in the production of a product. Usually the value of land is not included in physical capital as it is not a reproducible product of human activity. Capital. Sage of FanFiction is a fanfiction author that has written 14 stories for Naruto, Pokmon, Rise of the Guardians, XCom, Fatestay night, and Mass Effect. Sky EXE is a fanfiction author that has written 8 stories for Zoids, Strike Witches, Gundam 00, Gundam Seed, Ace Combat, Saki, and Gundam Build Fighters. In physics, the fundamental interactions, also known as fundamental forces, are the interactions that do not appear to be reducible to more basic interactions.