Which of the following statements are correct when a gymnast sitting on a rotating stool with his ar...........

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Which of the following statements are correct when a gymnast sitting on a rotating stool with his arms outstretched, suddenly lowers his hands?

1. The angular velocity decreases.

2. The angular velocity increases.

3. The moment of inertia decreases.

4. The moment of inertia increases

Select the correct answer using the codes given below

1 and 3

1 and 4

2 and 3

2 and 4

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Explanation:

A rotating object tends to remain rotating with a constant angular momentum unless it is acted upon by an outside twisting force. The definition of angular momentum is more complex than that of linear momentum. Angular momentum is the product of two quantities known as angular velocity and moment of inertia.