Same chapter2 marksDifficulty: Medium
Why is the centre of gravity of a body important when judging its stability?
Force, Turning Effect and Equilibrium
3 marksDifficulty: Medium
Why is the handle of a door fixed at the edge farthest from the hinges?
Original Khojo Papers practice question — not from a past board paper.
Answer
The turning effect of a force depends on the perpendicular distance from the axis of rotation. Placing the handle as far as possible from the hinges makes that distance the greatest it can be, so the smallest force is needed to produce the moment that opens the door.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A handle placed near the hinges would need a much larger push for the same turning effect.
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