The simple machine.
Material type:
Visual materialPublisher: Washington: National Geographic, 1993Description: 1 video: 20 min.ISBN: 0792224140.DDC classification: 621.8 Summary: Uses animation and live action to demonstrate the principles behind the usefulness of the lever, the inclined plane, the wedge, the screw, the pulley, and the wheel and axle.
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Uses animation and live action to demonstrate the principles behind the usefulness of the lever, the inclined plane, the wedge, the screw, the pulley, and the wheel and axle.
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