what is the resultant/ net force?\na) 400 n up\nb) - 400 n down\nc) 400 n down\nd) 800 n down
what is the resultant/ net force?\na) 400 n up\nb) - 400 n down\nc) 400 n down\nd) 800 n down
Answer
Explanation:
Step1: Define upward as positive
Let upward - direction be positive. The force of air $F_{air}=200N$ (upward) and the force of gravity $F_{gravity}=- 600N$ (downward).
Step2: Calculate the net - force
The net - force $F_{net}$ is the sum of the forces acting on the object. Using the formula $F_{net}=F_{air}+F_{gravity}$. Substitute the values: $F_{net}=200+( - 600)=200 - 600=-400N$. The negative sign indicates the direction is downward.
Answer:
B. - 400 N Down