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 Date: 2012-09-20 16:51:04Aerodynamics Simple machines Pound Elevator Energy Wedge Lift Measurement Physics Technology |
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Date: 2012-09-20 16:51:04Aerodynamics Simple machines Pound Elevator Energy Wedge Lift Measurement Physics Technology |
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ACTIVITY SHEET Prediction Prompt Lifting 100 Pounds Nina is trying to lift a 100-pound box from the floor to a shelf. She has two potential levers to help