How Do You Calculate Forces in a Three-Charge System?

[grandprix]

Homework Statement

Two point charges are located on the x axis: one charge, q1 = -10.5 nC, is located at -1.735 m ; the second charge, q2 = 40.0 nC, is at the origin (x=0)

Homework Equations

The Attempt at a Solution

Can somoene show me how to do this? I am stumped

 

[w3390]

You left off the actual question. However, I can almost guarantee that you will need to use F= (q1)(q2)/r^2

 

[rl.bhat]

Homework Statement

Two point charges are located on the x axis: one charge, q1 = -10.5 nC, is located at -1.735 m ; the second charge, q2 = 40.0 nC, is at the origin (x=0)

Homework Equations

The Attempt at a Solution

Can somoene show me how to do this? I am stumped

Where is the third charge? What is the problem?