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Problem: Calculating Moment of inertia: A 12-cm-diameter CD has a mass of 21 g. What is the CD'S moment of inertia for rotation about a perpendicular axisa) through its center and b) through the edge of the disk.

FREE Expert Solution

Moment of inertia about the center of a disk:

Icm=12mr2

Moment of inertia about a parallel axis:

I=Icm + md2

Where d is the distance from the center of mass.

(a)

Icm = (1/2)mr2 = (1/2)(21 × 10-3)(0.062

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Problem Details

Calculating Moment of inertia: A 12-cm-diameter CD has a mass of 21 g. 

What is the CD'S moment of inertia for rotation about a perpendicular axis

a) through its center and 

b) through the edge of the disk.

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