Answer:
Angular acceleration,

Step-by-step explanation:
It is given that,
Radius of the wheel, r = 0.2 m
Tangential speed of the wheel,

Tangential acceleration of the wheel,

It is assumed to find the angular acceleration of the wheel. It is given by :

Where
is the angular acceleration of the wheel
So,



So, the angular acceleration of the wheel is
. Hence, this is the required solution.