theBEAST
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Homework Statement
Using work energy theorem, solve:
The Attempt at a Solution
The actual answer (3.11s) is exactly half of my answer. Does anyone know what I did wrong?
The discussion revolves around applying the work-energy theorem to a problem involving a uniform disc. Participants are examining the relationship between the moment of inertia and kinetic energy in the context of this theorem.
Some participants are confirming the use of the moment of inertia formula for a uniform disc and discussing the implications of the factors involved in their calculations. There is an ongoing exploration of the reasoning behind the discrepancies in the answers obtained.
Participants are working under the constraints of the work-energy theorem and are focused on the specific parameters of the uniform disc problem. There is a noted confusion regarding the application of the moment of inertia in their calculations.
grzz said:Note that moment of inertia of a uniform disc about an axis through its centre and perpendicular to its plane is
[itex]\frac{1}{2}[/itex]MR[itex]^{2}[/itex].
There should be two factors of 1/2 - one from Iω2/2 for the KE and another from I=Mr2/2.theBEAST said:Yup! That is what I used I believe.