Inertia

“Inertia,” says Merriam-Webster, is “a property of matter by which it remains at rest or in uniform motion in the same straight line unless acted upon by some external force.”

I’m planning to bookmark this for the next time Charlotte complains about how hard it is to rouse me from an afternoon nap.

“Inertia, honey; Can’t help it. See—I show her the definition—it’s a law of physics.

It seems scientist can calculate one’s inertia—the mass times the square of perpendicular distance to the rotation axis or I=mr2.

I’m pretty sure this means my mass and radius are too heavy and wide to move quickly after a nap.

Unless, of course, that’s all changed by an “external force.”

And I’m pretty sure she would know what that meant.

Guess I’ll hold off on the physics lesson.