All Flashcards
In the right-hand rule diagram for angular momentum, what do the fingers, curl, and thumb represent?
Fingers: direction of , Curl: direction of , Thumb: direction of
What is the difference between angular momentum of a rigid object and a point object?
Rigid Object: , depends on moment of inertia and angular velocity. | Point Object: , depends on distance, mass, velocity, and angle.
How do angular impulse and linear impulse differ?
Angular Impulse: Changes rotational motion; involves torque and time. | Linear Impulse: Changes linear motion; involves force and time.
Compare and contrast torque and force.
Torque: Rotational force; causes angular acceleration. | Force: Linear force; causes linear acceleration.
How are angular momentum and linear momentum related?
Angular Momentum: 'Rotational oomph'; resistance to changes in rotational motion. | Linear Momentum: 'Linear oomph'; resistance to changes in linear motion.
What is the relation between angular impulse and change in angular momentum?
Angular Impulse: The cause of change in rotational motion. | Change in Angular Momentum: The effect of angular impulse.
What is the effect of applying a torque to an object?
The object experiences angular acceleration.
What happens when a spinning skater pulls their arms inward?
Their moment of inertia decreases, and their angular velocity increases (angular momentum remains constant).
What is the effect of a net torque acting on an object over time?
The object's angular momentum changes.
What happens when angular impulse is applied to a rotating object?
The object's angular momentum changes.
What is the effect of increasing the distance (r) of a point object from a reference point on its angular momentum?
The angular momentum increases (assuming other variables remain constant).
What happens to the angular momentum if no external torque acts on a system?
The angular momentum of the system remains constant (conservation of angular momentum).