Angular Motion

Question 1

Angular motion

Answer 1

Movement of a body or part of a body in a circular path about an axis of rotation

Question 2

Eccentric force

Answer 2

A force applied outside the centre of mass, resulting in angular motion

Question 3

Torque

Answer 3

A measure of the turning (rotational or eccentric) force applied to a body

Question 4

Principal axis of rotation

Answer 4

An imaginary line that passes through the centre of mass about which a body rotates: longitudinal, transverse and frontal axis

Question 5

Radian (rad)

Answer 5

A unit of measurement of the angle through which a body rotates

Question 6

Angular velocity

Answer 6

The rate of change in angular displacement measured in radians per second (rate per spin)

Question 7

Moment of inertia

Answer 7

The resistance of a body to change its state for angular motion or rotation

Question 8

Angular momentum

Answer 8

The quantity of angular motion possessed by a body

Question 9

Conservation of angular momentum

Answer 9

Angular momentum is a conserved quantity which remains constant unless an external eccentric force or torque is applied

Question 10

Angular analogue of Newton’s First Law of Motion

Answer 10

The angular equivalent of Newton’s first law of motion which states :
A rotating body will continue to turn about its axis of rotation with constant angular momentum unless acted upon by an eccentric force or external torque