A Wire 25-M Long Has a Cross-Sectional Area of 2 $\times$

question 43

Multiple Choice

A wire 2.5-m long has a cross-sectional area of 2.5 mm².It is hung vertically,and a 4.5-kg mass is hung from it.By how much does the wire stretch if Young's modulus for that material is 2.0 $\times$ 10¹¹ N/m²?

• A)0.22 mm
• B)2.2 mm
• C)0.022 mm
• D)0.72 mm
• E)0.072 mm

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