College Physics (4th Edition)

The magnetic force is $2.1 \times 10^{-14}~N$ and this force is directed to the west.
We can find the magnetic force: $F = q~v\times B$ $F = (-1.6\times 10^{-19}~C)(4.5\times 10^7~m/s)(5.0\times 10^{-3}~T)~sin~145^{\circ}$ $F = -2.1 \times 10^{-14}~N$ By the right hand rule, $v \times B$ would be directed to the east if the charge was positive. However, the negative charge results in a force directed to the west. The magnetic force is $2.1 \times 10^{-14}~N$ and this force is directed to the west.