sentence2_structure: Newton's second law of motion<>is<>more than a definition$$$it<>is<>a relationship among acceleration, force, and mass
sentence1: Newton's second law of motion states that force (F) is equal to mass (m) times acceleration (a).
sentence2: Newton’s second law of motion is more than a definition; it is a relationship among acceleration, force, and mass.
question: Newton’s second law of what is more than a definition; it is a relationship among acceleration, force, and mass?