2. A disc 30 cm diameter and 4 cm thick and density 0.0078 kg/cm³ oscillates at a frequency of 5 Hz on one end of a shaft which is built-in at the other end. When an unknown disc is added to the first disc, the frequency is reduced to 3.4 Hz. Find the moment of inertia of the unknown disc. 0.289 kg m² Ans.

International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:Andrew Pytel And Jaan Kiusalaas
Chapter9: Moments And Products Of Inertia Of Areas
Section: Chapter Questions
Problem 9.26P: A circular region of radius R/2 is cut out from the circular region of radius R as shown. For what...
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2.
A disc 30 cm diameter and 4 cm thick and density 0.0078 kg/cm³ oscillates at a frequency of 5 Hz
on one end of a shaft which is built-in at the other end. When an unknown disc is added to the
first disc, the frequency is reduced to 3.4 Hz. Find the moment of inertia of the unknown disc.
0.289 kg m²
Ans.
Transcribed Image Text:2. A disc 30 cm diameter and 4 cm thick and density 0.0078 kg/cm³ oscillates at a frequency of 5 Hz on one end of a shaft which is built-in at the other end. When an unknown disc is added to the first disc, the frequency is reduced to 3.4 Hz. Find the moment of inertia of the unknown disc. 0.289 kg m² Ans.
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