Running Up a Brick Pit

Running Up a Brick Pit Running straight up this steep brick wall is nearly impossible, but these men in Shaanxi, China, have found another way. Instead of climbing directly, they run in circles around the pit, gradually gaining height. As their speed increases, centripetal acceleration helps generate the force needed for their shoes to grip the wall through friction. Brick-lined pits like this can serve as water reservoirs or storage structures for agricultural and industrial use. Here, the curved walls provide an unusual test of speed, balance, and footwork. #wallrunning #shaanxi #china #physics #brickpit #science