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

Question

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

Quizplus · Accepted Answer

The Answer of 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

The Disc Brake of a High Performance Car Is Often