A Uniform Disk Has a Mass of 3

question 46

Multiple Choice

A uniform disk has a mass of 3.7 kg and a radius of 0.40 m. The disk is mounted on frictionless bearings and is used as a turntable. The turntable is initially rotating at 30 rpm. A thin-walled hollow cylinder has the same mass and radius as the disk. It is released from rest, just above the turntable, and on the same vertical axis. The hollow cylinder slips on the turntable for 0.20 s until it acquires the same final angular velocity as the turntable. What is the final angular momentum of the system?

• A) 0.93 /s
• B) 1.1 /s
• C) 1.3 /s
• D) 1.6 /s
• E) 1.9 /s

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Definitions:

Stressor

Any event, situation, or stimulus that causes stress, triggering a physiological or psychological response.

Sympathetic System

Part of the autonomic nervous system that activates the body's rapid involuntary response to dangerous or stressful situations (fight or flight response).

Parasympathetic Branch

Part of the autonomic nervous system responsible for stimulating "rest-and-digest" or "feed and breed" activities that occur when the body is at rest.

Type A Characteristics

Personality traits including competitiveness, impatience, and a sense of urgency, often linked to stress and heart disease.