Question

1. 4 n → 4 n ← net force:

Explanation:

Step1: Define net - force formula

Net force $F_{net}=\sum F$.

Step2: Assign direction and calculate

Let the right - hand direction be positive. One force is $F_1 = 4N$ (right) and the other is $F_2=- 4N$ (left). Then $F_{net}=F_1 + F_2=4+( - 4)$.

Step3: Simplify the expression

$F_{net}=4 - 4=0N$.

Answer:

$0N$