Final answer:
A door-latching assembly with a device that releases the latch when force is applied in the direction of egress travel is an example of a door hi nge system. Effectiveness in opening the door depends on the force applied, the point of application, and the direction of the force.
Step-by-step explanation:
A door-latching assembly incorporating a device that releases the latch upon the application of a force in the direction of egress travel is an example of a door hi nge system. When you push or pull on the door handle, the angular momentum of the system changes. The effectiveness of opening the door depends on factors such as the force applied, the point of application, and the direction of the force. Pushing perpendicular to the door is the most effective direction.