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Why is the handle of a door fixed at the edge farthest from the hinges rather than near the hinges?
AA larger distance produces a greater turning moment
BA larger distance reduces the door's total mass
CA smaller distance increases the applied force
DA smaller distance gives a greater turning moment
Answer & Solution
Correct answer: A. A larger distance produces a greater turning moment
1. The moment of a force is M = F x d.
2. For the same force, increasing the distance d from the hinges increases M.
3. So a handle at the far edge gives the largest turning effect, opening the door easily.
4. Rule out option D: a smaller distance gives a smaller moment, not greater.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 1 "Laws of Motion", p.11_
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