Question

It is the easiest to open a closed door by applying force at the edge of the door.

Answer 1

1. It is the easiest to open a closed door by applying force at the edge of the door, which is the maximum distance from the hinges.
2. This is because when we are moving closer to the hinges, we are decreasing the value of the perpendicular distance from the point of application of force to the pivot.
3. Hence, the moment of force decreases, and the turning effect reduces. As $Torque\mathit{=}Force\mathit{\times }distance\mathit{}from\mathit{}hinge$