The Earth's angular momentum about its axis stays nearly constant because:

  1. it is not rotating
  2. gravity keeps it constant
  3. it has no mass
  4. external torques on it are very small
Answer

D) external torques on it are very small

Hence the steady length of the day. SLO P-11-B-20 · Application

Physics MCQ · More Circular and Rotational Motion MCQs · Practise