Answer: 0.112 N due north.
Explanation:
Data:
E = 2.8 * 10^4 N/c
q = -4.0 * 10^ - 6C
F =?
Formula:
E = F / q
This formula tells that the magnitude of the electric field equals the electrostatic force divided by magnitude of the charge.
From that equation you get: F = Eq, which is what you need use for this problem.
Solution:
F= Eq = 2.8 * 10^4 N/C * (-4.0 * 10^ - 6 C) = - 0.112 N
The negative sign means that the force points in the opposite direction of the electric field, this is the force points toward the north.
