An ice skater with I = 5 kg m^2 spins at 1 rad/s, then pulls in her arms so I = 2.5 kg m^2. Her new angular velocity is:

  1. 1 rad/s
  2. 2 rad/s
  3. 4 rad/s
  4. 0.5 rad/s
Answer

B) 2 rad/s

I1omega1 = I2omega2 Rightarrow omega2 = 5 12.5 = 2 rad/s. SLO P-11-B-20 · Application

Physics MCQ · More Circular and Rotational Motion MCQs · Practise