Two Identical Cylindrical Discs Have a Common Axis

question 24

Multiple Choice

Two identical cylindrical discs have a common axis.Initially one of the discs is spinning.When the two discs 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.

---

Definitions:

Relevance

The importance or significance of something in relation to a specific context or subject.

Scholarly Reports

Detailed and systematic accounts of research findings, typically subjected to peer review, and published in academic journals or books.

Basic Structure

The fundamental organization or framework of a system, concept, or object.

Introduction

The beginning section of a document, speech, book, or research paper that provides an overview and sets the context.