F=ma is known as Newton's which law?

F=ma is an expression of Newton's Second Law of Motion. This law describes the relationship between the force acting on an object, its mass, and the acceleration produced. According to this law, the force applied to an object is equal to the mass of the object multiplied by its acceleration. This foundational principle explains how an object will accelerate in response to a net force acting upon it, making it crucial to understanding motion and mechanics. The significance of this law lies in its ability to quantify the dynamics of objects in motion, allowing predictions about their behavior under various forces.

Additionally, the other laws, such as the First Law, which addresses inertia, and the Third Law, which states that for every action there is an equal and opposite reaction, do not encapsulate the relationship highlighted by F=ma. The Fourth Law is not a recognized part of Newton’s laws of motion. Hence, the option indicating the Second Law is the correct identification of the relationship articulated by F=ma.