Two equal forces are applied to a door. The first force is applied at the midpoint of the door, the second force is applied at the doorknob. Both forces are applied perpendicular to the door. Which force exerts the greater torque?
A) both exert equal non-zero torques
B) the first at the midpoint
C) both exerts zero torques
D) the second at the doorknob
E) additional information is needed