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What is the weight of a 45 kg box? n
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When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?
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Match each type of lever with the correct diagram. 1. first-class 2. third-class 3. second-class
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What is the weight of a 45 kg box? n...
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