The discussion revolves around understanding the concept of momentum of inertia, particularly in the context of a flywheel's rotational speed and its variations. Participants are trying to clarify the calculations related to the average rotational speed of 430 RPM and how to derive values N1 and N2 based on percentage variations.
The discussion is active, with participants seeking clarification on the calculations and concepts presented. Some guidance has been offered regarding the interpretation of percentage changes and how they apply to the average speed, but there is no explicit consensus on the understanding of these concepts yet.
Participants are working within the constraints of a homework assignment, which may limit the information available for discussion. There is an emphasis on understanding the calculations rather than simply accepting the results provided by the teacher.
I believe it means that the flywheel smoothing is not perfect, it does not iron the speed out to be a perfectly constant 430 RPM. Rather, it smooths it out so that as the flywheel rotates, its instantaneous angular velocity during every revolution varies from a few % less than [what equates to] 430 RPM to the same few % faster than [what would equate to] 430 RPM.manal950 said:and I don't understand what mean by Speeeeed varies from above and below ?
0.02 is 2% and I think I explained the rest in post #2manal950 said:see the teacher said
N1 = 430 + ( 0.02 X 430 ) = 438.6 rpm
N2 = 430 - (0.02 X 430 ) = 421.4 rpm
How is that please tell me
manal950 said:I know this 430 + ( 0.02)
but why then multiply in 430 ??