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Why the handle of a door is fixed near the outer edge a door?
OR
Why are door handles usually on the opposite edge of the door from the hinge?
We can open or close a door more easily by applying a force at the outer edge of a door rather than near the hinge.
The moment produced by a force using a greater moment arm is greater than the torque produced by the same force by using a shorter moment arm.
Therefore, the handle of a door is fixed near the outer edge a door. (Τ ∝ L)