- #1
itzxmikee
- 10
- 0
Hi guys, these are the final 2 problems that I've been struggling with for the past day. Please help
1. Four point charges are situated at the corners of a square with sides of length a, as in Figure P15.4.
Figure P15.4
Find the expression for the resultant force on the positive charge q.(Use k_e for ke, q for q, and a for a.)
2. Fe = ke(|q||q|/r^2)
3. So I found the x and y components of all the -q. But still get a big sloppy answer.
Question 2
An electron is released a short distance above the surface of the Earth. A second electron directly below it exerts an electrostatic force on the first electron just great enough to cancel the gravitational force on it. How far below the first electron is the second?
Im sure you have to use coulombs law again. But I just don't know where to start with this question.
Thanks guys
1. Four point charges are situated at the corners of a square with sides of length a, as in Figure P15.4.
Figure P15.4
Find the expression for the resultant force on the positive charge q.(Use k_e for ke, q for q, and a for a.)
2. Fe = ke(|q||q|/r^2)
3. So I found the x and y components of all the -q. But still get a big sloppy answer.
Question 2
An electron is released a short distance above the surface of the Earth. A second electron directly below it exerts an electrostatic force on the first electron just great enough to cancel the gravitational force on it. How far below the first electron is the second?
Im sure you have to use coulombs law again. But I just don't know where to start with this question.
Thanks guys