Non-concurrent forces are forces that do not act at the same point in time or location. Instead, they are applied at different points on an object, which can lead to rotation or bending. For example, if two people push on opposite ends of a long board, the forces they apply are non-concurrent because they act at different locations along the board. These forces can create a moment or torque, which is the tendency of an object to rotate around an axis. Understanding non-concurrent forces is essential in fields like engineering and physics, as they help in analyzing how structures like bridges or buildings respond to various loads.