Electromagnetic fields and force

[dtesselstrom]

Homework Statement

What is the magnitude of the force on the proton in the figure? View Figure

Homework Equations

F=q(E+v*B)

The Attempt at a Solution

Ive tried just putting the numbers into that equation provided and it doesn't work so I am guessing there is some more that I am missing. I've also tried subtracting the two because B and E are in opposite directions but this also didn't work.

 

[daniel_i_l]

You just need that equation. Make sure that you get the directions af the forces right. Are you sure that the force resulting from B and the force form E are in opposite directions?

 

[Mentz114]

$$\vec{F}=q(\vec{E}+\vec{v}\times\vec{B})$$

Speaking of directions, this equation is a vector equation and the x is a cross product.