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A. What is it's angular acceleration? Answer - 10.9 rad/s^2

B. If the wheel starts from rest, what is its angular speed after 5 seconds? Answer - 54.4 rad/s

C. How many turns does it do in those 5 seconds? Answer 21.7 turns

I'm trying to study for my exam, and I'm stuck on this problem for our practice test. My professor gave us answers, but I'm just at a loss as to how to get the answers. Can anyone explain how to solve this problem? Thanks!