The vector is this: V=(5i-j)+q(i+4j) and it is in the direction of north-east. I have to find the constant (q) of this vector. The part of the question before this showed that if a vector of ki+kj, where k was a positive constant is a vector of magnitude k(square root)2. So I don't know whether I have to use that in part of this answer. I really have no idea where to start or what to do because I don't know what V is. But I was thinking about the direction, so do I have to adjust the q so that the angle is 45 degrees? Any help at all would be greatly appreciated. Thanks.