A Copper Wire of Length 2

question 20

Multiple Choice

A copper wire of length 2.0 m,cross sectional area 7.1 ´ 10^-6 m² and Young's modulus 11 ´ 10¹⁰ N/m² has a 200-kg load hung on it.What is its increase in length? (g = 9.8 m/s²)

• A)0.50 mm
• B)1.0 mm
• C)2.5 mm
• D)5.0 mm

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Definitions:

Negligence

The failure to exercise the care that a reasonably prudent person would exercise in like circumstances, leading to unintended harm.

Proximate Cause

A legal concept that identifies the primary cause of damage or injury in a negligence lawsuit, determining the extent of a defendant's liability.

Gas Cans

Portable containers designed specifically for the storage and transport of gasoline or other flammable liquids.

Foreseeable

An event or consequence that a reasonable person would expect to occur under the circumstances.