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blee22

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## Homework Statement

In the figure below, a right triangle, determine the magnitudes of the

a. Net e-field at p (assume a proton is placed at p)

b. Net electrostatic force at P

c. Net electrostatic potential at P

let q = 1.70 x 10^-8, R = 78cm and P is halfway between Q1 and Q3

Red dot is P

A^2 + B^2 = C^2 C = Sqrt(78^2+78^2)= 78sqrt(2)

## Homework Equations

F= (K|q1q2|)/R^2

E= (k|q|)/ R^2

PE = (kq1q2)/R

## The Attempt at a Solution

I just had a question about this problem, Since a proton is at the center, would Q1 and Q3 just cancel out since there are repelling one another and are the same charge?

If that is true would i just solve everything for the two point charges, proton and Q2 since i know what R would be between the two?