急 复习时被几道初一的物理题难住了1.已知弹簧秤在不挂重物时示数为2牛,下面挂100牛的重物时示数为92牛,则当弹簧秤的示数为20牛时,此时重物对弹簧秤的拉力是多少?2.当弹簧秤下挂着一个10
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![急 复习时被几道初一的物理题难住了1.已知弹簧秤在不挂重物时示数为2牛,下面挂100牛的重物时示数为92牛,则当弹簧秤的示数为20牛时,此时重物对弹簧秤的拉力是多少?2.当弹簧秤下挂着一个10](/uploads/image/z/3871716-60-6.jpg?t=%E6%80%A5+%E5%A4%8D%E4%B9%A0%E6%97%B6%E8%A2%AB%E5%87%A0%E9%81%93%E5%88%9D%E4%B8%80%E7%9A%84%E7%89%A9%E7%90%86%E9%A2%98%E9%9A%BE%E4%BD%8F%E4%BA%861.%E5%B7%B2%E7%9F%A5%E5%BC%B9%E7%B0%A7%E7%A7%A4%E5%9C%A8%E4%B8%8D%E6%8C%82%E9%87%8D%E7%89%A9%E6%97%B6%E7%A4%BA%E6%95%B0%E4%B8%BA2%E7%89%9B%2C%E4%B8%8B%E9%9D%A2%E6%8C%82100%E7%89%9B%E7%9A%84%E9%87%8D%E7%89%A9%E6%97%B6%E7%A4%BA%E6%95%B0%E4%B8%BA92%E7%89%9B%2C%E5%88%99%E5%BD%93%E5%BC%B9%E7%B0%A7%E7%A7%A4%E7%9A%84%E7%A4%BA%E6%95%B0%E4%B8%BA20%E7%89%9B%E6%97%B6%2C%E6%AD%A4%E6%97%B6%E9%87%8D%E7%89%A9%E5%AF%B9%E5%BC%B9%E7%B0%A7%E7%A7%A4%E7%9A%84%E6%8B%89%E5%8A%9B%E6%98%AF%E5%A4%9A%E5%B0%91%3F2.%E5%BD%93%E5%BC%B9%E7%B0%A7%E7%A7%A4%E4%B8%8B%E6%8C%82%E7%9D%80%E4%B8%80%E4%B8%AA10)
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