- #1
IanAlpace
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Homework Statement
Hey, just wanted to ask a quick question about how to find the moment of inertia of two rods (of equal mass and length) attached together in a T shape (the axis is at the bottom of the vertical rod). My calculations got the correct result but I just wanted to check whether my equation is correct.
Homework Equations
m = 1,00kg
l = 1,00m
I = (1/3)*m*l2+(1/12)*m*l2+m*l2
I = 1,42kgm2
The Attempt at a Solution
This is a part of my homework and the answer given by my equation matches the answer given by my teacher, but I'm a little confused about the equation. I'm mostly curious about why the equation contains three masses, when the problem only contains two objects with mass. The initial equation that I came up with (I = (1/3)*m*l2+(1/12)*m*l2) got the wrong answer which left me a bit confused.
Thanks in advance.
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