Question

a person standing on a rotating platform has his hands lowered he suddenly outstrecthed his arms then angular momentum will be

Answer 1

Answer:

Angular velocity will increase

Explanation:

moment of inertia will increase

when increase in moment of inertia then kinetic energy decreases and some amount of energy also decrease in folding his hand near to its body but the second way is that when he folds his hands his radius decreases and his angular momentum increases as in case of somersaults use

or simply,

It's the rule used by stage dancers