Rotational Inertia With One Handsome Fella

In this video, the handsome gentleman we see here starts off by giving us the definition of Rotational Inertia and what it is associated with. He states, "that inertia is a property that resists in change in motion because of mass, and rotational inertia is the resist in the change in rotational motion that depends on mass." He demonstrates this by balancing a pole on his finger. He takes a weighted clamp and places it on one end of the poll. He flips it from either end to try and figure out which side is easier to balance upon. In this case, it is easier for him to balance the poll when the weighted end is opposite of his finger. This is because the rotational inertia is greater when the weight is opposite. The further the mass is distributed from the rotational axis, then greater the rotational inertia and the greater resistance it has to rotational motion.