Angular Acceleration of a Pulley

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Homework Help Overview

The discussion revolves around calculating the angular acceleration of a pulley given specific parameters such as radius, moment of inertia, and applied force. The subject area is rotational dynamics.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster expresses confusion about how to apply the provided information to the equations listed. Some participants suggest considering Newton's 2nd law for rotation as a potential approach.

Discussion Status

There is an indication that one participant believes they have arrived at a solution, while another confirms this. However, the discussion does not explore the reasoning behind the calculations in depth, leaving some aspects of the problem open for further exploration.

Contextual Notes

The original poster notes feeling stuck and unable to utilize the given information effectively, which may suggest a need for clarification on the application of the equations or concepts involved.

Cheddar
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Homework Statement


A cable is around a pulley with:
radius = 0.1 m
moment of inertia = 0.15 kg * m(squared)

The cable receives a pull of:
force = 12 N

Find the magnitude of the resulting angular acceleration of the puller.

Homework Equations



Average angular acceleration = Change in angular velocity / Elapsed time
Average angular velocity = Angular displacement / Elapsed time

The Attempt at a Solution



I'm completely stuck since none of the given information can be used in the equations listed above.
 
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Hint: Consider Newton's 2nd law for rotation.
 
Thanks, I think I have it. So:
angular acceleration = 12 * 0.10 / 0.15 = 8.0 rad/s(squared)
?
 
You got it.
 

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