A flywheel speeds up from 0 rad/s to 20 rad/s while turning through 50 rad. Its angular acceleration is:

  1. 2 rad/s^2
  2. 8 rad/s^2
  3. 5 rad/s^2
  4. 4 rad/s^2
Answer

D) 4 rad/s^2

omegaf^2 = omegai^2 + 2alphatheta Rightarrow alpha = 20^2 - 0^22(50) = 4 rad/s^2. SLO P-11-B-09 · Application

Physics MCQ · More Circular and Rotational Motion MCQs · Practise