Physics vector question (I will give a medal to the best response).

Okay, I know that when you cross multiply vectors:

i x j = -j x i = k

But what about -i x j or -j x -i?

Would it be -k?

Question

Physics vector question (I will give a medal to the best response).

Okay, I know that when you cross multiply vectors:

i x j = -j x i = k

But what about -i x j or  -j  x -i? 

Would it be -k?

ybarrap · Answer

yes it would be. Use the right hand rule

loser66 · Answer

@ybarrap  tell more, I want to know, too. Please

anonymous · Answer

Thank you @ybarrap!

ybarrap · Answer

If you take unit vector in the x direction, that would be $\Large\hat{i}$ in the y direction $\Large\hat{j}$, using the right hand rule, you cross these two unit vectors and you get the unit vector in the z axis direction, $\Large\hat{k}$

loser66 · Answer

got you.

ybarrap · Answer

Here is a better explanation: http://en.wikipedia.org/wiki/Cross_product#Coordinate_notation

ybarrap · Answer

You're welcome.