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:

Mary Ainsworth

A developmental psychologist known for her work on attachment theory, which focuses on the bonds between children and their caregivers.

Attachment

An emotional bond that typically forms between infants and their caregivers, profoundly influencing the child's development and future relationships.

Strange Situation

A research method developed by Mary Ainsworth to assess the quality of attachment relationships between infants and their caregivers through a series of introductions, separations, and reunions.

Attachment

The emotional bond that forms between an infant and their caregiver, which is critical for the child's personal development.