Final answer:
To have a resultant force directed along the positive y-axis and have a magnitude of 1500N, you must consider vector addition.
Step-by-step explanation:
To have a resultant force directed along the positive y-axis and have a magnitude of 1500N, you must consider vector addition. Let's assume there are two forces acting in the y-direction, F1 and F2. If F1 has a magnitude of 1200N and F2 has a magnitude of 300N, you can add these two vectors to get the resultant force:
R = F1 + F2 = 1200N + 300N = 1500N
The resultant force will be directed along the positive y-axis if F1 and F2 are both pointing in that direction.