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The moment of inertia, or rotational inertia, determines the torque needed for a desired angular acceleration about a rotational axis. Like inertial mass is the resistance to being linearly accelerated, the moment of inertial is the resistance to being rotationally accelerated.
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What's the seconde moment of a T beam with a heel?
the seconde moment of area of a rectangle is
Iy = (bh^3)/12
b : base
h : height
What is the second moment of area of a T beam like this one ?