Question

a man is sitting on a rotating stool with his arms outstretched Suddenly he folds his arm the angular velocity a decreases b increases c remains constant d becomes zero.

Answer 1

B.

Conservation of angular momentum is constant . When arms are closed the inertia decrease and the velocity increase.

Answer 2

Answer:

Option (c). is correct

Explanation:

According to the question, there is no external torque.

Now, we know that if there is no external torque then the angular momentum is conserved.