Final answer:
When resolving vectors into their components, the x-component and y-component are used. Resolving vectors into their components along common axes makes it easier to add them and determine their magnitude and direction.
Step-by-step explanation:
When resolving vectors into their components, the x-component and y-component are used. Components along the same axis, such as the x-axis, are vectors along the same line and can be added together like ordinary numbers. The same is true for components along the y-axis. Resolving vectors into their components along common axes makes it easier to add them. By finding the components of a vector, its magnitude and direction can be determined.