Simple pendulum Help. Dunno Why Im wrong.

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Homework Help Overview

The discussion revolves around a physical pendulum problem involving a rigid rod and a meter stick, where the setup is suspended from a pivot and released after being pulled out at a small angle. Participants are examining the implications of the configuration on the period of oscillation.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning the classification of the pendulum, with one noting that it is not a simple pendulum and suggesting the need to consider the meter stick in the calculations. Another participant acknowledges this by identifying it as a physical pendulum and discussing the moment of inertia.

Discussion Status

The discussion is exploring different interpretations of the pendulum's nature and the necessary calculations involved. Guidance has been offered regarding the moment of inertia, indicating a productive direction in the conversation.

Contextual Notes

There is a mention of a figure that may provide additional context, which is not included in the discussion. The original poster's initial approach did not account for the complexities introduced by the meter stick.

e=mcahhhh
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Homework Statement



A very light rigid rod with a length of 0.742 m extends straight out from one end of a meter stick. The combination is suspended from a pivot at the upper end of the rod as shown in the following figure. The combination is then pulled out by a small angle and released.

Homework Equations


Period T=2pi sqrt(L/g)

The Attempt at a Solution



T=2pi* sqrt (.743/9.8)=1.72s

http://www.webassign.net/serpse8/15-p-034-alt.gif
 
Last edited:
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It is not a simple pendulum, I am afraid. A picture would be useful. You did not take the meter stick into account.

ehild
 
Oh i see its a physical pendulum
 
Yes. Find the moment of inertia.

ehild
 

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