A disc's angular velocity changes from 0 rad/s to 20 rad/s in 4 s. Its angular acceleration is:

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

A) 5 rad/s^2

alpha = omegaf - omegait = 5 rad/s^2. SLO P-11-B-08 · Understanding

Physics MCQ · More Circular and Rotational Motion MCQs · Practise