If you push directly on the handle of a closed door and it does not swing open, then
A) its rotational inertia must be much larger than your torque.
B) the net torque on the door must be zero.
C) the lever arm must be very small.
D) the angular momentum of the door is larger than your force.

Question

Quizplus · Accepted Answer

If the door does not swing open, it means the net torque on the door is zero. This could occur if there is an equal and opposite torque acting on the door, such as when the hinge provides an opposite torque to balance the torque you apply by pushing on the handle.

If You Push Directly on the Handle of a Closed