A Ferris wheel with a diameter of 35.0 m in starts from rest and achieves its maximum operational tangential speed of 2.20 m/s in a time of 15.0 s. (a) What is the magnitude of the wheel's angular acceleration? (b) What is the magnitude of the tangential acceleration after the maximum operational speed is reached?

Answer 1

2.2 m/s is an angular speed of 2.2/35π = 0.02 rad/s

so, its angular acceleration is

(.02rad/s)/(15s) = 0.00133 rad/s^2

I expect you can find the other one.