A moment of 300 ft-tons is created by a force of 15,000 tons. What is the moment arm?

Correct Answer: Option D — 0.02 foot

The moment arm is calculated by dividing the moment by the force (Moment / Force = 300 ft-tons / 15,000 tons = 0.02 foot). This fundamental naval architecture principle determines the perpendicular distance from the axis of rotation to the line of action of the force.