How can the inertia of an object be determined?

Answer 1

As it turns out, inertial mass is equivalent to gravitational mass, so if you simply weigh an object, you can determine both its weight and its inertia. These are always in direct proportion; twice as much weight equals twice as much inertia. The main difference is that weight does change in different locations; an object can become weightless while in orbit, while inertia does not change. But here on the surface of the Earth, it is very simple to weigh an object and get a meaningful result which applies both to gravitational mass and inertial mass. If you were in orbit, then the problem becomes a bit trickier.

Answer 2

The inertia of an object can be determined by measuring its mass and the distance of its mass from the axis of rotation. This can be done using the formula for rotational inertia, which is given by I = m * r^2, where I is the inertia, m is the mass, and r is the distance from the axis of rotation.