allerySteel is more elastic than copper, brass and aluminium, so steel is preferred in:
APaper carry bags
BRubber car tyres
CHeavy-duty machines
DChildren's balloons
Answer & Solution
Correct answer: C. Heavy-duty machines
1. Steel needs the most force for a given strain.
2. That makes it the stiffest choice.
3. So it goes into heavy-duty machines and structures.
_Source: syllabus Physics Part II, Chapter 9, Mechanical Properties of Solids._
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