Final answer:
The equivalent resultant force is 6 kn/m.
Step-by-step explanation:
To replace the loading with an equivalent resultant force, we need to find the sum of the individual forces. In this case, we have two forces, w1 and w2. To find the resultant force, we can simply add the magnitudes of the forces. Therefore, the equivalent resultant force would be w1 + w2.
Given w1 = 2 kn/m and w2 = 4 kn/m, the equivalent resultant force would be 2 kn/m + 4 kn/m = 6 kn/m.