What is the electric field at point P?

[Mr.somebody]

Homework Statement

Point P is collinear with a +2.80 μC charged particle and a -8.50 μC charged particle as shown in the diagram below. Point P is 10 cm to the left of the positive charge and 20 cm to the left of the negative charge. What is the electric field at point P?

p--------(2.80uc)---------(-8.50uc)

Homework Equations

e=kq/r^2

The Attempt at a Solution

i found the e field from p to the positive charge and p to the negative charge should i add them to find the total e field at point p?

 

[gogobeid]

Yes you just need to add the field due to the two charges; but remember that the E field is a vector!