Two equal forces are applied to a door at the doorknob. The first force is applied perpendicular to the door; the second force is applied at 30° to the plane of the door. Which force exerts the greater torque?
A)the first applied perpendicular to the door
B)the second applied at an angle
C)both exert equal non-zero torques
D)both exert zero torques
E)additional information is needed

Question

Quizplus · Accepted Answer

Torque is maximized when the force is applied perpendicular to the lever arm. The first force is perpendicular, thus exerting greater torque than the second force applied at an angle.

Two Equal Forces Are Applied to a Door at the Doorknob