A flywheel (I = 0.8 kg m^2) is brought from rest to 50 rad/s in 10 s. The torque needed is:

  1. 8 N m
  2. 5 N m
  3. 2 N m
  4. 4 N m
Answer

D) 4 N m

alpha = 5 rad/s^2; tau = Ialpha = 4 N m. SLO P-11-B-19 · Application

Physics MCQ · More Circular and Rotational Motion MCQs · Practise