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what is perpendicular axis theroem?

what is perpendicular axis theroem?

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Apoorva Arora IIT Roorkee
askIITians Faculty 181 Points
9 years ago
In physics, the perpendicular axis theorem (or plane figure theorem) can be used to determine the moment of inertia of a rigid object that lies entirely within a plane, about an axis perpendicular to the plane, given the moments of inertia of the object about two perpendicular axes lying within the plane. The axes must all pass through a single point in the plane.

Define perpendicular axes x,, y,, and z, (which meet at origin O,) so that the body lies in the xy, plane, and the z, axis is perpendicular to the plane of the body. Let Ix, Iy and Iz be moments of inertia about axis x, y, z respectively, the perpendicular axis theorem states that

I_{z}=I_{x}+I_{y}

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