query: Why doesn't this perpetual motion machine work?
positive_passages.docid: 82272
positive_passages.text: Why doesn't this magnetic perpetual motion machine work?
negative_passages.docid: 52327
negative_passages.text: Why isn't this 3-way wiring working?
negative_passages.docid: 34831
negative_passages.text: Are orbiting planets an  example of perpetual motion?
negative_passages.docid: 76666
negative_passages.text: Why does the basic intuition fail here? What is the reason behind it?
negative_passages.docid: 10484
negative_passages.text: How do grandfather clocks keep going?
negative_passages.docid: 82061
negative_passages.text: How do chemical propulsion systems not break the law of conservation of energy?
negative_passages.docid: 116336
negative_passages.text: Why this JSFiddle does not work
negative_passages.docid: 66415
negative_passages.text: How are self-replicating mines supposed to work?
negative_passages.docid: 100630
negative_passages.text: Why doesn't the potential energy of any object equal 0
negative_passages.docid: 19783
negative_passages.text: Why does a system try to minimize potential energy?
negative_passages.docid: 66959
negative_passages.text: Motor to spin slowly, low torque
negative_passages.docid: 151608
negative_passages.text: Any solutions to Veritasium's hydrodynamic levitation?
negative_passages.docid: 136637
negative_passages.text: Why doesn't a commutator cause the rotation to reverse periodically or stop?
negative_passages.docid: 94778
negative_passages.text: Why can't I do this to get infinite energy?
negative_passages.docid: 5210
negative_passages.text: Why doesn't current flow in reverse biased diode?
negative_passages.docid: 21125
negative_passages.text: Why does Bernoulli's principle work?
negative_passages.docid: 90626
negative_passages.text: Work in circular motions