query: A question about magnets, energy, and forces
positive_passages.docid: 107695
positive_passages.text: From where do the permanent magnets get energy from?
negative_passages.docid: 128759
negative_passages.text: Why don't we define potential due to a magnetic field?
negative_passages.docid: 71369
negative_passages.text: Electric force between charges in two different media
negative_passages.docid: 112723
negative_passages.text: The problem of self-force on point charges
negative_passages.docid: 49405
negative_passages.text: Can we calculate the magnetic field of a permanent magnet?
negative_passages.docid: 45266
negative_passages.text: How are forces "mediated"?
negative_passages.docid: 156952
negative_passages.text: Vector Field Conceptual Question
negative_passages.docid: 42623
negative_passages.text: What is the relationship between force and kinetic energy?
negative_passages.docid: 90157
negative_passages.text: Can a magnetic field be induced without an electric field?
negative_passages.docid: 47638
negative_passages.text: Mass and Newton's Second Law
negative_passages.docid: 109438
negative_passages.text: Finding net magnetic and electric force on charged particle
negative_passages.docid: 32338
negative_passages.text: A Basic Question about Gravity, Inertia or Momentum or something along those lines
negative_passages.docid: 62189
negative_passages.text: Equal and opposite reaction - forces coming in pairs - or just common sense?
negative_passages.docid: 61345
negative_passages.text: Newton's second law explanation
negative_passages.docid: 104907
negative_passages.text: Why is the direction of net force on an object and the direction of acceleration of that object different in this problem?
negative_passages.docid: 8786
negative_passages.text: Mechanism by which electric and magnetic fields interrelate
negative_passages.docid: 12758
negative_passages.text: Magnets arranged in a sphere