What is the unit of angular displacement.

$(1$ mark$)$

$($ii$)$

How many radians are there in one revolution?

$(1$ mark$)$

$($iii$)$

Define angular velocity

$(1$ mark$)$

$($iv$)$

What is the unit of angular velocity

$(1$ mark$)$

M

What is the unit of angular acceleration

$(1$ mark$)$

$($b$)$