Circular motion

Question 1

What is angular displacement?

Answer 1

Angle through which an object turns about the centre of circle, usually measured in rad

Question 2

What is one radian?

Answer 2

Angle subtended at the centre of circle by an arc equal in length to the radius

θ = s/r

Question 3

What is angular velocity?

Answer 3

rate of change of angular displacement swept out by radius of circle