The statement force equals mass times acceleration is newton's second law of motion why is this a law than a theory?

A theory is a possible explanation of certain occurence.

Theory relates to a model in science because it presents the possible paradigms and patterns of the said concept and fact. It explains and elaborates the phenomenon of why it happened, how it happened and the factors that are invovlved in the process.

Newton's law of motion are considered laws since they happen indefinitely and as part of the laws of natural physics. Second law of motion as stated is the force equals mass x acceleration which really happens. A objects weights about its mass the amount of matter in the object and the acceleration as it dashes and is pulled into the ground and the force upward.