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2. Simple Magnetic Overunity Toy - Wikipedia

   en.wikipedia.org/wiki/Simple_Magnetic_Overunity_Toy

   The sum of kinetic energy and potential energy is always constant (minus energy lost due to friction). The ball never has more energy than it did when first put into position. The magnetostatic field produced by any arrangement of stationary permanent magnets is a conservative field of the magnetic scalar potential. This means any magnetic ...

3. Gilbert U-238 Atomic Energy Laboratory - Wikipedia

   en.wikipedia.org/wiki/Gilbert_U-238_Atomic...

   The Gilbert U-238 Atomic Energy Laboratory was packaged in a customized metal case. The Gilbert U-238 Atomic Energy Lab is a toy lab set designed to allow children to create and watch nuclear and chemical reactions using radioactive material. The Atomic Energy Lab was released by the A. C. Gilbert Company in 1950.

4. Euler's Disk - Wikipedia

   en.wikipedia.org/wiki/Euler's_Disk

   Euler's Disk, invented between 1987 and 1990 by Joseph Bendik, [1] is a trademarked scientific educational toy. [2] It is used to illustrate and study the dynamic system of a spinning and rolling disk on a flat or curved surface. It has been the subject of several scientific papers. [3] Bendik named the toy after mathematician Leonhard Euler. [4]

5. Newton's cradle - Wikipedia

   en.wikipedia.org/wiki/Newton's_cradle

   The kinetic energy, proportionate to the velocity squared, is converted to potential energy as the 2nd mass rises to the same height as the initial ball, then it falls and the cycle repeats in the other direction. An idealized Newton's cradle with five balls when there are no energy losses and there is always a small separation between the ...

6. Kinetic energy - Wikipedia

   en.wikipedia.org/wiki/Kinetic_energy

   Disregarding loss or gain however, the sum of the kinetic and potential energy remains constant. Kinetic energy can be passed from one object to another. In the game of billiards, the player imposes kinetic energy on the cue ball by striking it with the cue stick. If the cue ball collides with another ball, it slows down dramatically, and the ...

7. Water rocket - Wikipedia

   en.wikipedia.org/wiki/Water_rocket

   As the rocket begins accelerating upward, the launch tube blocks the nozzle, and very little water is ejected until the rocket leaves the launch tube. This allows almost perfectly efficient conversion of the potential energy in the compressed air to kinetic energy and gravitational potential energy of the rocket and water. The high efficiency ...