I just don't understand.

In the product F=qVxB , take q = 5,
V= 2.0i + 4.0j + 6.0k and F = -170i + 70j + 10k.
What then is in unit-vector notation if Bx = By?

Question

I just don't understand.

In the product  F=qVxB  , take q = 5, 
 V= 2.0i + 4.0j + 6.0k  and  F = -170i + 70j + 10k. 
What then is  in unit-vector notation if Bx = By?

anonymous · Answer

lets matrix play

anonymous · Answer

$$F = qV \times B = q\left[\begin{matrix}i & j & k\ Vx & Vy & Vz\Bx & By & Bz\end{matrix}\right]$$

Plug in components of V as given by the equation, and q is a scalar multiple. The cross product of V and B can be given by the determinant of the matrix. Keeping variables for Bx, By, and Bz, use vector components to solve for Bx By and Bz separately,