I still don't understand why these types of motors tend to spin in one direction or another. In theory the direction of spin should be random since when the north pole of the rotor magnet is lined up with the north pole of the electromagnet in the stator the rotor could be repelled clockwise or...
The cross product of the normal to the plane and the reflected vector will be the the product of the two vectors magnitudes since sin(90) = 1. This seems like a lot of work for something you would think would not take so much. Having to use matrices to solve. Doing all of this you would still...
I don't even know how to start. A hint in my homework states that if two lines do not intersect, they can be embedded in parallel planes but I don't know how that helps me find how close two lines come to each other. If they do intersect I would plug both lines into an r(t) and set them equal...
This problem is a sample flight path of a ship in space.
Its path is described by the line r(t) = (-1+t)i + (2-t)j
An asteroid has the starting point (0, 5, -1) and a heading vector of 2i + j + 3k
Ship
x = -1 + t
j = 2 -t
z = 0
asteroid
x = 0 + 2t
y = 5 + t
z = -1 + 3t
The...
Okay so in a problem I have a vector reflecting off a mirror. I have the equation for the normal of the mirror at the coordinates where the vector of light hits the mirror. The normal of the mirror and the vector incident are in the same geometric plane. How do I find the refection of the vector...