rotational motion Flashcards
displacement
for a particle, it is the length form the direction form the origin to the particle. it is a function of time.
velocity
the rate of change of displacement with time
acceleration
the rate of change of velocity with time
angular displacement
the angular motion travelling by a rotating abject measured in radians. a full rotation is 2 pi
angular velocity
the rate of change of angular displacement
angular acceleration
the rate of change of angular velocity
tangential acceleration
the rate of change of linear (tangential) velocity
centripetal acceleration
The acceleration of an object moving in a circular path which acts towards the
centre of axis of rotation.
Torque
A force which produces rotation about an axis. It is a vector quantity.
Inertia
An object’s resistance to change its motion.
Moment of Inertia
A measure of an object’s resistance to angular acceleration about a given axis.
It depends on the mass of the body and the distribution of its mass about a
given axis of rotation.
Angular Momentum
The momentum of a rotating object. It is a vector quantity.
Principle of
Conservation of
Angular Momentum
The total angular momentum before an interaction is equal to the total angular
momentum after the interaction, provided there are no external torques acting
on the objects.
Rotational Kinetic
Energy
The kinetic energy of a rotating body.
