阿摩線上測驗
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阿摩線上測驗
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5. (15%) A 30-kg block rests on top of a 20-Kg block supported by, but not attached to, a spring of constant 40 N/m. The upper block is suddenly removed. Determine (a) the maximum speed reached by the 20-kg block, (b) the maximum height reached by the 20-kg block.