Laws of conservation of linear and angular momentum can be derived from Newton's laws of motion in mechanics. Are they valid beyond mechanics?

Explanation

To determine whether the laws of conservation of linear and angular momentum are valid beyond mechanics, we can follow these steps:

### Step 1: Understand the Laws of Conservation
The laws of conservation of linear and angular momentum state that in a closed system, the total linear momentum and total angular momentum remain constant if no external forces or torques are acting on the system.

### Step 2: Derivation from Newton's Laws
These conservation laws can be derived from Newton's laws of motion. Specifically, Newton's second law (F = ma) implies that the change in momentum of an object is equal to the net force acting on it. If no net force acts on a system, the momentum remains constant.

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