Final answer:
Scalar analysis for a moment focuses solely on magnitude without regard to direction. Moments are vector quantities, involving both magnitude and direction in physics.
Step-by-step explanation:
Scalar analysis for a moment is primarily used for determining only the magnitude of a quantity. It does not take into account the direction; therefore, scalar analysis cannot be used to analyze properties that have both magnitude and direction, which are characteristics of a vector quantity. When considering the context of physics, especially mechanics, a moment is indeed a vector quantity because it involves both magnitude and direction. Therefore, the correct answer is (b) Magnitude only.