Watch in the diagram above that a downward vector will provide a partial or full cancellation of an upward vector.
\(F_{Net} = F_{Norm} - F_{grav}\)
\(F_{Net} = 20 - 20\)
\(F_{Net} = 0N\)
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.
\(F_{Net} = F_{app} - F_{frict}\)
\(F_{Net} = 22 - 14\)
\(\boxed{\boxed{F_{Net} = 8N}}\)
Answer:
(in order to have a net force of 8 N, right)
B. 8 Newtons
