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AP Physics 1

Vocabulary Chapter 8

TermDefinition
Rotational Inertia The resistance of an object to changes in its rotational motion.
Rotational Inertia depends on The distribution of mass. The greater the distance between an objects ma concentration and the axis of rotation, the greater the rotational inertia.
The greater an object's rotational inertia The more difficult it is to change the rotational speed of an object
Linear momentum The product of the mass and the velocity of an object rotating objects have angular momentum
Angular momentum The product of rotational inertia and rotational velocity. Angular momentum = rotational inertia x rotational velocity.
Angular velocity When direction is assigned to rotational speed. A vector whose magnitude is the angular speed.
Newton's first law of inertia for rotating systems states that An object or system of objects will maintain its angular momentum unless acted upon by an unbalanced external torque.
The law of conservation of angular momentum States that is no unbalanced external torque acts on a rotating system, the angular momentum of that system is constant.
Angular momentum is conserved When no net external torque acts on an object
Simulated gravity From within a rotating frame of reference, there seems to be an outwardly directed centrifugal force, which can stimulate gravity.
Angular acceleration Change in angular velocity caused by the application of unbalanced torque.
Torque The capability of rotating objects around a fixed axis. Torque is a vector quantity both having direction and magnitude.
Created by: BMcCormack
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