As Gokul43281 correctly pointed out to me, the dot product of two vectors is a scalar. I looked up this page to read about this. Thing is, I think conceptually. I could simply accept that this is so, but I don't "see" why it so. As my screen name implies, I must know why something is so, or I am not satisfied. The subject that started this was KE. My thinking follows the lines that since KE is a result of motion, momentum, it must contain a vector quantity. Yet thanks to Gokul I've researched this "dot product" and discover the result is a scalar. This doesn't make sense to me. How can one ignore the "direction" of the motion which is responsible for KE? What am I missing?