A small sphere with a mass of 2.00×10−3
g
g
and carrying a charge of 5.20×10−8
C
C
hangs from a thread near a very large, charged insulating sheet, as shown in the figure (Figure 1). The charge density on the sheet is −2.40×10−9
C/
m
2

If there was no gravity then their would be no downword force on the football to have it return the the grownd, and if there was no friction (mainly air friction) then there would be no opposing force the stop the ball from moving through the air allowing the ball to travle ∞.

The correct choice is c