Question

Moment of inertia formula for semicircle

Answer 1

hola there

highlighted in green is the moment of inertia equation for asemicircle rotating about an axis perpendicular to its surface at its radius What's really interesting about this is the moment of inertia equationfor a full circle is the same equation!!!!!!

Answer 2

Moment of inertia is the name given to rotational inertia, the rotational analog of mass for linear motion. It appears in the relationships for the dynamics of rotational motion. The moment of inertia must be specified with respect to a chosen axis of rotation. For a point mass, the moment of inertia is just the mass times the square of perpendicular distance to the rotation axis, I = mr2. That point mass relationship becomes the basis for all other moments of inertia since any object can be built up from a collection of point masses.