The resultant vector is usually defined as a single vector that is obtained from the addition or the subtraction of two distinct vectors. It is widely used in the field of Mathematics and Physics, where this resultant vector denotes the magnitude as well as direction of any physical property such as velocity, force, and are represented graphically.
These resultant vectors along with the other vectors are drawn by using an arrow.
Both gravity and centrifugal force act on the Moon which causes it get pulled towards Earth (gravity) and get "flung away" so it doesn't hit us (centrifugal force).