A person standing on rotating table has his hands lowered. He suddenly stretches his arms. The angular momentum of man

Question

A person standing on rotating table has his hands lowered. He suddenly stretches his arms. The angular momentum of man (A) decreases (B) increases (C) becomes zero (D) remains same.

Tardigrade Admin · Accepted Answer

Moment of Inertia will increase hence the kinetic energy decreases and some amount of eneryy 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.

Q. A person standing on rotating table has his hands lowered. He suddenly stretches his arms. The angular momentum of man

decreases

increases

becomes zero

remains same.

Moment of Inertia will increase hence the kinetic energy decreases and some amount of eneryy 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.