A turbine blade rotates with angular velocity ?(t) = 2. 00 rad/s- 2. 1. 00 rad/s3t 2. What is the angular acceleration of the blade at t = 9. 10 s?
a) -38. 2 rad/s²
b) -19. 1 rad/s²
c) -36. 2 rad/s²
d) -86. 0 rad/s²
e) -172 rad/s²