2) you have the x distance, and the y distance to each charge. Use that distance in coulombs law. Now above P, you can simplify Ey greatly by using symettry arguments (Eydue to the rigth will be downward, Ey due to left will be upward, such that the vertical components cancel, so Ey net is zero).
3) Now at P, there will be no Ey (as there is no force in the y direction).
Ex will be twice what each charge will produce, as they are on different sides, opposite charges. So figure Ex for one charge, then double it.
This entire problem is trying to get you to visualize the results of symettry.
There is a figure with a +2.0 UC charge on the left and a -2.0 uC charge on the right. P is in the center between the two charges. They are 5.0 cm apart. 1) Find the electric field 5.0 cm to the left of P. 2) Find the electric filed 5.0 cm directly above P. 3) Find the electrif field at P. I need the fx and fy value.
So far I know I have to use Coulombs Law. For number one I got 25.6 MN/C. For number 2 I got -5.15MN/C. For number three I got -57.6 MN/C. Though the answers want the fx and fy value and I don't know how to get that, please help.
1 answer