Posted by Rafaela on Thursday, April 7, 2011 at 3:31pm.
I don't want someone to do this for meI'm just totally lost and don't even know where to startI'm totally lost on this one the earth is surrounded by an electric field with a strenth of 100 N/C at the surface. Its electric properties are the same as a point charge located at its center. How would the gravatational force and electrical force compare foor an electron at earth's surface. Compare magnitude and direction.
I don't know where to even startthis is a high school Physics, not AP, and I have the formulas but I don't know where I find the point charge etc to work withAny helpthank you

PhysicsPlease help!  drwls, Thursday, April 7, 2011 at 3:57pm
Relax. This is pretty easy. Not even AP
The electrical force on an electron at the Earth's surface is
F_e = E*e ,
where
e is the electron charge and E is the field strength they gave you.
The gravitational force on an electron at the same place is
F_g = m_e*g
where m_e is the mass of the electron and g is the acceleration of gravity.
You should know where to look up e, m_e and g.
Compute and compare the two forces. 
PhysicsPlease help!  Rafaela, Thursday, April 7, 2011 at 5:20pm
Now that doesn't look so hard
Thanks for breaking it into smaller steps for me