Question

Two unequal masses m and 2m are attached to a thin bar of negligible mass that rotates about an axis perpendicular to the bar. When m is a distance 2d from the axis and 2m is a distance d from the axis, the moment of inertia of this combination is i.

Answer 1

The moment of inertia for this combination is I when m is 2d from the axis and 2m is 2d from the axis, therefore I = mr2.

Explain the moment of inertia.

Moment of inertia is a word used to describe a physical property that measures how resistant a body is to having the speed of its rotation along an axis modified by the application of a torque (turning force). Axis options include internal, external, stationary, and moving.

What does it mean to be in an inertial moment?

The moment of inertia is recognized as such and not as a moment of force because it opposes circular motion.

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