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Physics Practical Investigation using a mass, a fulcrum and a plank
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[QUOTE="haruspex, post: 6234475, member: 334404"] Perhaps the ruler is supposed to project from the edge of the table. That would make a better defined fulcrum than would a pencil. It leaves open which end the coins are supposed to be on. [/QUOTE]
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Physics Practical Investigation using a mass, a fulcrum and a plank
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