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Force and Motion (13:51)
All living things can move. Both simple and sophisticated machines are governed by the same principles. Learn about the different kinds of forces, balanced forces, moment of a force, the definition of forces, examples, and characteristics.
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Bill Nye The Science Guy Series: Motion
Did you know that nothing can move or stop by itself? Everything needs a push or pull--a force--to make it move or stop. Sometimes an object might seem to be at rest, even when it is in motion. Confused? It's all relative. Relative motion, that is.
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