A force of 20 N is applied tangentially at the rim (radius 0.5 m) of a wheel with I = 2 kg m^2. Its angular acceleration is:

  1. 2.5 rad/s^2
  2. 10 rad/s^2
  3. 5 rad/s^2
  4. 20 rad/s^2
Answer

C) 5 rad/s^2

tau = Fr = 10 N m; alpha = tau/I = 5 rad/s^2. SLO P-11-B-19 · Application

Physics MCQ · More Circular and Rotational Motion MCQs · Practise