Question
Physics Question on System of Particles & Rotational Motion
A person sitting firmly over a rotating stool has his arms stretched. If he folds his arms, his angular momentum about the axis of rotation
A
increases
B
decreases
C
remains unchanged
D
doubles
Answer
remains unchanged
Explanation
Solution
A person sitting firmly over a rotating stool has his arms stretched and as he folds his arms, centre of mass remain unchanged and therefore, angular momentum about the axis of rotation remain unchanged.