# Tag Info

Accepted

### Energy Conservation in electromagnetism

we can also express everything I've said about magnetic field too Here is your mistake. In fact, in the situation you have described the magnetic fields must add constructively. Recall that for an EM ...
• 81.9k

### Exact statement of conservation of momentum

Wikipedia's "in a closed system" and Taylor's "if there are no external forces on a pair of particles" are the same assumption, when applied to a pair of particles. In particular, ...
• 42.3k

• 81.9k
1 vote
Accepted

### Understanding Constants of Motion and the dimension of the effective Space available

Remember that you are interested in calculating trajectories. By definition, trajectories lie in CoM’s level sets. So when you have multiple CoM’s, trajectories lie in the intersection of their level ...
• 5,108

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