Answer:
The average angular acceleration is

Step-by-step explanation:
From the question we are told that
From the question we are told that
The length of the bat is
\
The initial linear velocity is

The time is

The velocity at t is

Generally average angular acceleration is mathematically represented as

Where
is the finial angular velocity which is mathematically evaluated as



and
is the initial angular velocity which is zero since initial linear velocity is zero
So

