Element to relate the moment of a force with the magnitude of the force and the moment arm. Or to relate the moment of a couple of forces with the magnitude of one of the forces and the arm of the couple.
|M:||Moment, a positive value correspond with the opposite sense of clockwise.|
|f:||Magnitude of the force, or the magnitude of one of the forces in the couple.|
|d:||The moment arm, or the arm of the couple.|