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Question

From the following 3 solids of the same shape and same volume which one has the highest inertia?

A
Steel
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B
Wood
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C
Aluminium
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D
None of the above
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Solution

The correct option is A Steel
Mass is a measure of inertia.
For same shape and same volume, we can compare densities to tell which will have the highest mass. Since steel has the highest density, so it means it has the highest mass for a given shape and volume.
Therefore, steel has the highest inertia among wood, steel and aluminium.

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