Rotational Motion Definitions

Question 1

Velocity

Answer 1

The rate of change of displacement

Question 2

Acceleration

Answer 2

The rate of change of velocity
It is also the second differential of displacement with respect to time.

Question 3

Angular Velocity

Answer 3

The rate of change of angular displacement

Question 4

Angular acceleration

Answer 4

The rate of change of angular velocity
It is also the second differential of angular displacement with respect to time.

Question 5

Moment of Inertia

Answer 5

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.

Question 6

Principle of conservation of Angular Momentum

Answer 6

The total angular momentum before and interaction is equal to the total angular momentum after the interaction, provided there are no external torques acting on the object.