The discussion revolves around a cylindrical pulley that is rotating and the calculations related to its energy and moment of inertia. Participants are exploring the concepts of rotational motion and energy storage in a flywheel context.
Some participants have provided calculations for angular velocity and moment of inertia, while others are questioning how to proceed with finding the energy stored in the system. There is an ongoing exploration of the relationships between these quantities without a clear consensus on the final approach.
Participants note that certain information, such as specific formulas or ratios, may not be provided, leading to further inquiry into the necessary calculations for the problem.
kaspis245 said:Homework Statement
Cylindrical shape pulley ( m = 6 kg, R = 0.18 m) is rotating at a frequency f = 10 s-1. Due to constant torque it stops. Calculate the work done by the breaking force.
Homework Equations
w = 2πf
The Attempt at a Solution
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I can calculate the angular velocity:
w = 2πf = 62.8 rad/s
I don't know what to do now.
kaspis245 said:I don't know, it is not given. I think I'm suppose to find some kind of ratio.
kaspis245 said:Here is moment of inertia for a cylinder:
I = 1/2 MR2 = 1/2 * 6 kg * 0.18 m = 0.54 kg/m