Gravitational force between two objects depends on

How do you tell if someone actually cares about you? and just say they do?

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration