Final answer:
The ry-axis oRo, 900(x, y) rule is used to find the horizontal and vertical components of the resultant vector in vector addition.
Step-by-step explanation:
The rule mentioned, ry-axis oRo, 900(x, y) is a method used in vector addition to find the horizontal component (Rx) and vertical component (Ry) of the resultant vector, R.
The rules state that Rx = Ax + Bx + Cx and Ry = Ay + By + Cy, where Ax, Bx, Cx, Ay, By, and Cy are the horizontal and vertical components of the given vectors, A, B, and C.
For example, if we have vector A = 3i + 2j and vector B = -i + 4j, we can find their resultant vector, R, using the rule. The horizontal component of R, Rx, would be 3 + (-1) = 2, and the vertical component of R, Ry, would be 2 + 4 = 6. So, the resultant vector is R = 2i + 6j.
In summary, the ry-axis oRo, 900(x, y) rule is used to find the horizontal and vertical components of the resultant vector in vector addition.