The Disc Brake of a High Performance Car Is Often

question 64

Multiple Choice

The disc brake of a high performance car is often made of carbon fiber instead of iron, thereby reducing the mass. If the mass of a carbon disc is that of iron for the same shape and size, by what factor is the moment of inertia changed?

• A) one quarter
• B) half
• C) unchanged
• D) doubled
• E) quadrupled

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