Question

what happens when

two force are exerted in same direction

two force are exerted indifferent direction

Answer 1

When two forces acts in the same direction then the net equivalent force is given as the sum of these individual forces as,
$F_{net}=F_1+F_2$

But, when two forces acts in the opposite direction then the net equivalent force is given as the difference of these individual forces as,
$$\begin{gathered} F_{net}=F_1+\left(-F_2\right) \\ {F}_{net}=F_1-F_2 \end{gathered}$$
In second case negative sign with the force shows that the direction of force is opposite to the another one.