Use information about objects of a variety of shapes (e.g., solid disk, ring, solid sphere, hollow sphere, solid rod, etc.) to determine their moment of inertia (I).
A solid disk with a mass of 1.9 kg and a radius of 20.5 cm is rotated about the axis through its center of mass as shown at right. The path of rotation is shown with a red arrow.
What is the moment of inertia of the disk if it is rotated around this axis?
Icm
kg•cm2
A ring with a mass of 1.2 kg and a radius of 22.5 cm is rotated about the axis through its center of mass as shown at right. The path of rotation is shown with a red arrow.
What is the moment of inertia of the ring if it is rotated around this axis?
A solid sphere with a mass of 1.2 kg and a radius of 10.5 cm is rotated about the axis through its center of mass as shown at right. The path of rotation is shown with a red arrow.
What is the moment of inertia of the sphere if it is rotated around this axis?
A thin spherical shell with a mass of 1.2 kg and a radius of 28.4 cm is rotated about the axis through its center of mass as shown at right. The path of rotation is shown with a red arrow.
What is the moment of inertia of the shell if it is rotated around this axis?
A long, thin rod with a mass of 278 grams and a length of 74.5 cm is rotated about the axis through its center of mass as shown at right. The path of rotation is shown with a red arrow.
What is the moment of inertia of the rod if it is rotated around this axis?