Question

Which statement describes the gravitational force and the electrostatic force between two charged particles?

1. The gravitational force may be either attractive or repulsive, whereas the electrostatic force must be attractive.
2. The gravitational force must be attractive, whereas the electrostatic force may be either attractive or repulsive.
3. Both forces may be either attractive or repulsive.
4. Both forces must be attractive.

Answer 1

Force is a vector quantity & must be treated accordingly; the electric force between two objects always acts along the line that connects their centers of charge ... Electric forces can be either attractive orrepulsive, but gravitational forces are always attractive (because objects can have either a positive or a negative charge, .

Answer 2

I believe the answer is. the gravitational force must be attractive, whereas the electrostatic force may be either attractive or repulsive.