A Heavy Crate Containing Artworks from the National Gallery of Victoria

question 5

Multiple Choice

A heavy crate containing artworks from the National Gallery of Victoria is to be shipped to London to be part of an exhibition. The artworks are securely fastened in a cubic crate 1 m on a side. This crate is placed on top of a rubber mat in the back of a cargo plane. The rubber mat has an uncompressed thickness of 1 cm and a Young's Modulus of 100 000 N m-2. When the crate is placed on the rubber, the mat is compressed by 0.1 mm. How much elastic energy is stored in the rubber in this situation?

• A)0.025 J.
• B)0.25 J.
• C)2.5 J.
• D)25 J.
• E)250 J.

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Definitions:

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