What is the net force on this object? a. 22 newtons b. 8 newtons c. 0 newtons d. 36 newtons (there's a picture)

Watch in the diagram above that a downward vector will provide a partial or full cancellation of an upward vector. 





And a leftward vector will provide a partial or full cancellation of a rightward vector.

In this case, as the meanings of the vectors are opposite, one of the forces receives the negative signal and thus a piece of the other vector is drawn, as shown in the figure. And to know the module of the resultant force, if it subtracts the modules of the forces.





(in order to have a net force of 8 N, right) 

B. 8 Newtons