Find electric field a distance P from a charged rod

[isukatphysics69]

Homework Statement

The figure below shows a thin, vertical rod of length L with total charge Q. The indicated point P is a horizontal distance x from the one end of the rod. What is the electric field at point P. Express your answer in component notation in the two blanks below.

L = 5.0 cm, Q = 3.0 nC, and x = 3.0 cm.

Homework Equations

kq/r^2

The Attempt at a Solution

theta = arctan(5/3) = 59 deg
total charge = [(8.99x10^9)(3x10^-9)]/((0.03)^2) = 29966
x component = 29966cos59=15417

1.8/2 points

 

[isukatphysics69]

Nevermind I just forgot to square the distance lol

 

[isukatphysics69]

Why am I only getting 1.8/2 points for 15417N/C? is something incorrect?

 

[isukatphysics69]

this is so frustrating what is the sig figs ??

 

[isukatphysics69]

LOL IT WAS ROUNDED DOWN TO 15000

 

[berkeman]

LOL IT WAS ROUNDED DOWN TO 15000

So you're good now?

 

[isukatphysics69]

So you're good now?

yes please see other thread I am stuck again on y component

 

[SammyS]

Homework Statement

The figure below shows a thin, vertical rod of length L with total charge Q. The indicated point P is a horizontal distance x from the one end of the rod. What is the electric field at point P. Express your answer in component notation in the two blanks below.

L = 5.0 cm, Q = 3.0 nC, and x = 3.0 cm.


View attachment 230884

Homework Equations

kq/r^2

The Attempt at a Solution

theta = arctan(5/3) = 59 deg
total charge = [(8.99x10^9)(3x10^-9)]/((0.03)^2) = 29966
x component = 29966cos59=15417

1.8/2 points

This working of this problem is incorrect.