Couple to score is a unit of measurement used to express the mechanical energy of a rotating system, such as a flywheel or a turbine. It represents the amount of energy stored in the system due to its rotational motion. One couple to score is equivalent to 1.356 kilogram-meters squared per second squared (kg·m²/s²). This unit is particularly useful in engineering and physics applications, where it helps to quantify the rotational energy of machines and predict their behavior under various conditions.