Simple pendulum Help. Dunno Why Im wrong.

AI Thread Summary
The discussion revolves around a physics problem involving a pendulum system consisting of a light rigid rod and a meter stick. The user initially calculates the period of the pendulum using the formula for a simple pendulum but realizes that the system is actually a physical pendulum, not a simple one. Another participant points out the need to consider the moment of inertia of the meter stick in the calculations. The conversation emphasizes the importance of correctly identifying the type of pendulum to apply the right equations. Understanding the distinction between simple and physical pendulums is crucial for solving the problem accurately.
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
 
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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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