Why the handle of a door is fixed near outer edge of door rather than hinge?
Answers
Why is the door handle kept near the outer edge?
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The efficiency of mechanical advantage.
A door is part of a system. Walls prohibit passage. Door openings allow passage. Doors control passage. The passage could be light, air, people, insects, etc.
The door is also a system. It's components, for this discussion, are hinges, handles, and latches. The hinge and latch connect the door to the wall. The hinge durably connects one edge of the door to a wall segment while allowing angular rotation of the rest of the door about the hinge’s bearing point. The latch temporarily connects the unhinged edge of the door to another wall segment.
The handle serves two purposes. It enables manual operation of the latch to disconnect the door from the wall. It also provides a point of action for rotating the door about the hinge’s bearing point.
There are two reasons door handles are far from the hinge: mechanical advantage for the latch to prevent door opening, and mechanical advantage for the handle to enable door opening.
First, the latch. Placing the latch closer to the hinge would make the door a class 2 lever, which puts the latch at a mechanical disadvantage in relation to a person pushing or pulling on the door. But placing the latch at a point furthest from the hinged edge creates a class 3 lever, making the door a class 3 lever, with mechanical advantage to the latches designed purpose to resist force.
To illustrate, calculate the force required to overcome resistance of a latch that is able to resist 10 inch-pounds of effort at 1 inch.
Case 1: Latch is 1 inch from the hinge
Case 2: Latch is 36 inches from the hinge.
The door width is the lever.
The hinge is the fulcrum bearing point.
The latch is the point of resisting load.
The point of effort is the mid-point of the 36-inch wide door.
The effort arm is the Distance Effort (de) from the point of effort to the fulcrum bearing point (36 inches/2=18 inches).
The load arm is the Distance of the Load (dl) between the point of resisting load and the fulcrum bearing point.
PLZ MARK AS BRAINLEIST
because if u fix ur handle at hind side than it will be little difficult for u to open the door