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Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in pillar? - Physics

Answer in Brief

Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in pillar?

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Solution

In summer when the temperature increases considerably the bridge made of metal expands and rollers slide to allow for expansion otherwise the bridge may break the pillar.

Concept: Thermal Expansion - Superficial Expansion
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APPEARS IN

Selina Concise Physics Class 8 ICSE
Chapter 6 Heat Transfer
Short/long Answer Questions | Q 25 | Page 121
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