A Large 75-Kg Lighting Fixture Can Be Hung from Wires

question 58

Multiple Choice

A large 75-kg lighting fixture can be hung from wires of identical size and shape made of aluminum,brass,or copper.The values of Young's modulus for these metals are 0.70 × 10¹¹ Pa (aluminum) ,0.91 × 10¹¹ (brass) ,and 1.1 × 10¹¹ (copper) .Which wire would stretch the least distance?

• A)aluminum
• B)brass
• C)copper
• D)They will all stretch the same distance.

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