Two forces are described below:
Force 1: The force with which Earth pulls a person to its center
Force 2: The pulling force applied on a door to open it
Which statement is true about the forces?
A. Both are contact forces.
B. Both are non-contact forces.
C. Force 1 is a contact force and Force 2 is a non-contact force.
D. Force 1 is a non-contact force and Force 2 is a contact force.