Physical capital or just capital is defined in economics as a factor of production or inputs consisting of computers, machinery, buildings, and the like. To answer our question, an example of physical capital is a truck a company purchases for work because it is an input that can be used in the production. A truck a worker buys for personal use is not considered physical capital but a personal need; a worker who physically learns to work on a truck his company buys is not a physical capital but a human capital; same with a worker who physically learns to work on a truck his company buys.