![]() Displacement, velocity, momentum, force, and acceleration are all vector quantities. I think this is similar to the issue in algebra labeling the unknown quantity as x. A vector quantity has magnitude and direction. If b, were shorter than a, we would have the diagram reversed. If we really think about it, what the dot product represents is the shortest distance we would travel along a vector (among many other notions that may not be related to geometric distance). the inDirection vector is treated as a directional arrow coming in to the plane. I think this is the source, seeing diagrams and definitions that explicitly mention it. The inNormal vector defines a plane (a planes normal is the vector that is perpendicular to its surface). gives the angle in degrees between the vectors as measured in a counterclockwise direction from v1 to v2. 9, we can see that the dot product is typically representing one vector projected onto another. You can think of vectors like directions on a treasure map: go left 10 steps. I had to work through it, reconcile and eliminate that faulty thinking. A vector has a direction and a magnitude (also known as its strength or length). I am not sure why this was stuck in my head for so long. This angle is measured from the plane normal \(\theta\) - The angle of incidence is equal to the angle of reflection.Here are the components that are illustrated in fig. ![]() I wanted something that could use the inputs directly. I wanted something that would not require changing any of the inputs. ![]() Figure 2: Incident vector, I, reflecting from surface with normal N as vector R. ![]()
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