Which of the following quantities is conserved in an isolated system when no external torques act?

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Q: Which of the following quantities is conserved in an isolated system when no external torques act?

Solution: In an isolated system with no external torques, angular momentum is conserved.

Steps: 6

Step 1: Understand what an isolated system is. An isolated system is one where no external forces or torques are acting on it.
Step 2: Learn about torques. A torque is a force that causes an object to rotate.
Step 3: Recognize that when no external torques are acting, the system's internal motions do not affect its overall rotation.
Step 4: Identify what is conserved in such a system. In physics, 'conserved' means that a quantity remains constant over time.
Step 5: Know that in the absence of external torques, the quantity that remains constant is angular momentum.
Step 6: Conclude that in an isolated system with no external torques, angular momentum is conserved.