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.

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Definitions:

Circumstantial

Circumstantial refers to conditions or facts that are relevant to an event or action but not necessarily directly related to it, often used in legal and psychological contexts to describe surrounding conditions that may influence behaviors or outcomes.

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A thought disorder characterized by rapid shifts from one topic to another, often seen in manic states of bipolar disorder.

Loose Associations

A thought disorder characterized by a disorganized thinking process, evident when someone jumps from one idea to another with little logical connection.

Tangential

Diverging from the previous topic or path without reaching a definite goal or conclusion.