r and q are collinear
r and q are perpendicular
The magnitude of r is 52 units
The projection of r on q is \(\sqrt{117}\) units.
Correct answer is B
The dot product of two perpendicular forces = 0
\((9i + 6j).(4i - 6j) = 36 - 36 = 0\)
Hence, r and q are perpendicular.