Answer:
C
Explanation:
if the mass is smaller the acceleration is larger
Explanation:
Formula to calculate angular acceleration is as follows.

or, 
Putting the given values into the above formula as follows.

=
= 0.326 
Thus, we can conclude that the wheel’s angular acceleration if its initial angular speed is 2.5 rad/s is 0.326
.
Answer:
it should be -2m/s
Explanation:
Because it is going down from minutes 6-8. And down in most cases means negative. And since it is going down 2 it should be -2m/s.
Hope this helped!!