Calculating forces using point charges.

[ninerx]

A small charge of 4 x 10^-6 C is located at the point x=2 m, y=3 m in the xy-plane. A second small charge of -3 x 10^-6 C is at the point x=4 m, y=-2 m.

A) Calculate the force that the first charge exerts on the second. Express your answer in both terms of magnitude and angle, and also in i , j notation.
B) A) Calculate the force that the second charge exerts on the first. Express your answer in both terms of magnitude and angle, and also in i , j notation.

I'm not really sure where to start with this, since we have just started a new term and haven't done much in lecture. I was unable to ask the professor for help since his office hours conflict with one of my other courses. Any help would be appreciated!

 

[Ivan92]

Are you familiar with Coulomb's law? This will help you out if you know that. Also you will need to split up the forces into x-y components.