A ring of charge with radius R = 0.5 m is centered on the origin in the x-y plane. A positive point charge is located at the following coordinates:
x = 19.0 m
y = -14.6 m
z = -2.6 m
The point charge and the total charge on the ring are the same, Q = +40 C.
Find the net electric field along the z-axis at z = 7.3 m.
E net,x = ?
E net,y = ?
E net z = ?
Due to ring: E(z)=(kqz)/(z^2+R^2)^(3/2)
Due to a point charge: E= kq/r^2
The Attempt at a Solution
I found the electric field due to the ring pretty easily I just plugged everything into the equation I have above and for that I got 6699.284 N/C, is that right? I thought for the point charge I just plug and chug as well but I got it wrong and I don't know why. I have no idea how else to do it. Help please!