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:

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The process through which laws are enacted or passed by a governing body.

Alfred North Whitehead

A British philosopher, logician, and mathematician, best known for his work in process philosophy and his development of the metaphysical theory known as process theology.

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