Product of rotational inertia and rotational velocity.
angular momentum
An object or system of objects will maintain a constant angular momentum unless acted upon by an unbalanced external torque.
law of conservation of angular momentum
The perpendicular distance between an axis and the line of action of force that tends to produce rotation about that axis.
lever arm
Product of the mass and the velocity of an object.
linear momentum
The reluctance of an object to change its state of rotation, determined by the distribution of the mass of the object and the location of the axis of rotation or revolution.
rotational inertia
Rotational speed together with a direction for the axis of rotation or revolution.
rotational velocity
The rotational analog of force; the product of force and the lever arm (measured in newton-meters). It tends to produce rotational acceleration.