posted by Frank .
A charged cloud system produces an electric field in the air near the Earth's surface. A particle of charge -2.2 10-9 C is acted on by a downward electrostatic force of 3.0 10-6 N when placed in this field.
(c) What is the magnitude of the gravitational force Fg on the proton?
(d) What is the ratio Fel / Fg in this case?
(I found the electric field is 1363.636 N/C, and the electrostatic force Fel is 2.185E-16 already, these are question a) and b) of this problem.)
I am sorry??
I don't understand what you mean.