is the line of action
Three forces are applied to a body. They are :
F1 = (4,5) applied at (1,2)
F2 = (2,-1) applied at (3,-1)
F3 = (-3, 2) applied at (-2,1)
i) Find the resultant force
Answer : R = (3,6)
ii) Find the total moment about the origin
Answer: I calculated this and it is -5 Nm
iii) The line of action of R cuts the Y-axis at (0,d). Find d
Question: Can I assume that R = (3,6) is applied at (0,d) and its moment about the origin is - 5Nm? In order to find what d is?
If that assumption is wrong then how do i find d?