# Pendulum Oscillations

## Homework Statement

A physical pendulum consists of 4.8 m long sticks joined together as shown in Fig. 15-43. What is the pendulum's period of oscillation about a pin inserted through point A at the center of the horizontal stick?

http://edugen.wiley.com/edugen/courses/crs1650/art/qb/qu/c15/fig15_43.gif [Broken]

## Homework Equations

w = sqt(MgL/I)
T = 2pi/w
I = 1/12ml^2 + 1/3ml^2
L = l/4

## The Attempt at a Solution

I solved for I using the above equation 3, solved for L using equation 4, plugged these values into equation 1 getting angular velocity. Then I solved for T in equation 2 and I do not get the correct answer.

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you have to acount for the fact that the centre of mass of the T-shaped pendulum is positioned higher then it would with just a simple one-stick pendulum

you have to acount for the fact that the centre of mass of the T-shaped pendulum is positioned higher then it would with just a simple one-stick pendulum
how do i take that into account..?

Wot: no string this time?

Wot: no string this time?
What? lol

What? lol

Your pendulum seems to be more rigid, but the problem
emphasizes the impotency of the moronic reliance on formulae.

Your pendulum seems to be more rigid, but the problem
emphasizes the impotency of the moronic reliance on formulae.
Yea.. that doesn't help much =P

Yea.. that doesn't help much =P
Could anyone else please provide some input?

anyone??

L is the distance between the pivot and c of m
You said "1/4"
It is 4.8m/4