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## Homework Statement

If we have a hollow ball completely filled with water which is rolling without slipping on a horizontal ground. If the water freezes which of the parameter will remain unchanged-

angular speed, angular momentum, linear momentum, kinetic energy, total energy

## Homework Equations

$$\vec L=I_{cm}\omega + m\vec v x \vec r $$

## The Attempt at a Solution

I am quite sure about the angular momentum as the water(presumably not rotating) and ball will have all its factors same that affect its angular momentum. Same goes for kinetic energy. But I have no clue regarding the angular speed and linear momentum.

The answer is given as angular momentum and total energy.