Which of the following quantities is conserved in a closed system with no external torques acting on it?

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Q: Which of the following quantities is conserved in a closed system with no external torques acting on it?

Solution: In a closed system with no external torques, angular momentum is conserved.

Steps: 5

Step 1: Understand what a closed system is. A closed system is one where no matter or energy is exchanged with the surroundings.
Step 2: Learn about torques. A torque is a force that causes an object to rotate. If there are no external torques, it means nothing from outside is trying to change the rotation.
Step 3: Know what angular momentum is. Angular momentum is a measure of how much motion an object has while rotating.
Step 4: Remember the principle of conservation. In physics, when we say something is conserved, it means it stays the same over time.
Step 5: Combine the information. Since there are no external torques acting on the closed system, the angular momentum must remain constant.