17 Rotational Dynamics Lecture Review

This set of flashcards covers key vocabulary related to Rotational Dynamics, focusing on concepts such as moment of inertia, torque, and their implications in rotational motion.

Moment of Inertia

The rotational equivalent of mass in linear mechanics, calculated by multiplying the mass of each particle by the square of its distance from the axis of rotation.

Torque

The tendency or ability of a force to rotate an object about a pivot point, dependent on the force and the distance from the pivot point where the force is applied.

Lever Arm

The distance between the pivot point and the location where the force is applied.

Rotational Inertia

A measure of an object's resistance to changes in its rotational motion, depending on the distribution of mass relative to the axis of rotation.

SI Unit of Moment of Inertia

Kilogram-meter squared (kg.m²).

Effect of Distance on Moment of Inertia

The further the mass is from the axis of rotation, the higher the moment of inertia.

Comparison of Rotational Inertia

Rotational inertia varies depending on the axis about which an object rotates.

Torque Equation

Torque equals the product of the lever arm and the magnitude of the tangential force.

Balanced Torques

No rotation is produced when the torques acting on an object balance each other.

Influence of Mass Distribution

Mass farther from the rotation axis contributes more to the moment of inertia than mass nearer to the axis.