Two Identical Cylindrical Disks Have a Common Axis

question 52

Multiple Choice

Two identical cylindrical disks have a common axis. Initially one of the disks is spinning. When the two disks are brought into contact, they stick together. Which of the following is true?

• A) The total kinetic energy and the total angular momentum are unchanged from their initial values.
• B) Both the total kinetic energy and the total angular momentum are reduced to half of their original values.
• C) The total angular momentum is unchanged, but the total kinetic energy is reduced to half its original value.
• D) The total angular momentum is reduced to half its original value, but the total kinetic energy is unchanged.
• E) The total angular momentum is unchanged, and the total kinetic energy is reduced to one-quarter of its original value.

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The process of creating goods or services through the combination of labor, materials, and technology.

Distribution

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The act of searching and obtaining food resources in the wild, practiced by humans and animals alike.