BEMB Angular Kinetics Flashcards
What is moment of inertia?
- Resistance to angular acceleration
- inertial property to rotating bodies
- based on both mass and the distance the mass is distributed from.
How is moment of inertia calculated?
The product of the particle mass and radius square
What is the radius of gyration?
distance from the axis of rotation to a point where the body’s mass could
be concentrated without altering its rotational characteristics.
What is angular momentum?
It is the quantity of angular motion possessed by a body.
What is the principle of conservation of angular momentum?
The total angular momentum of a given system remains constant in the absence of external forces.
Tuck position VS Extended Position for inertia and angular velocity
Tuck Position: Small inertia, Large angular velocity
Extended Position: Large inertia, small angular velocity
What produces change in angular momentum?
Angular impulse
what is the angular equivalent of linear kinematic quantities?
Mass?
Force?
momentum?
impulse?
moment of inertia (I = mk2)
torque
angular momentum
angular impulse (F x d x t)
What is the angular law of inertia?
A rotating body will maintain a state of rest or constant motion unless acted upon by external torque that changes its state.
What is the angular law of acceleration?
A net torque causes angular acceleration when a body:
-Has a magnitude that is proportional to the torque
-In the direction of the torque
-Inversely proportional to the body’s moment of inertia
What is angular law of reaction?
For every angular action, there will be an equal and opposite angular reaction.
When one body exerts a torque on a second body, the second body exerts a reaction torque that is equal in magnitude and opposite in direction than on the first body.
