Two equal-magnitude forces are applied to a door at the doorknob. the first force is applied perpendicular to the door, and the second force is applied at 60â° to the plane of the door. which force exerts the greater torque about the door hinge?

a. the first force (applied perpendicular to the door)
b. both forces exert equal non-zero torques
c. both forces exert zero torque
d. the second force