At the Australian War Memorial in Canberra, a Large Historic

question 31

Multiple Choice

At the Australian War Memorial in Canberra, a large historic aircraft is to be put on display. The plan is to suspend it by a steel cable from the roof. The aircraft weighs 8 tonnes, and the cable will be 5 m long, and has a radius of 1 cm. Steel has a Young's Modulus of 2x1011 N m-2. By how much will the cable stretch (in mm) when it is supporting the whole weight of the aircraft?

• A)0.08.
• B)0.8.
• C)3.2.
• D)7.7.
• E)32.0.

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