纸带上三个点,分别离点O(在点O时速度为0)31.4mm,70.5mm,125.4mm,求出中间一点的瞬时速度.公式应该是[(125.4-70.5)+(70.5-31.4)]/(2*0.化成单位为m时算得为2.35m/s,可是答案却是1.175.公式没错,过程好像也
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![纸带上三个点,分别离点O(在点O时速度为0)31.4mm,70.5mm,125.4mm,求出中间一点的瞬时速度.公式应该是[(125.4-70.5)+(70.5-31.4)]/(2*0.化成单位为m时算得为2.35m/s,可是答案却是1.175.公式没错,过程好像也](/uploads/image/z/3778513-25-3.jpg?t=%E7%BA%B8%E5%B8%A6%E4%B8%8A%E4%B8%89%E4%B8%AA%E7%82%B9%2C%E5%88%86%E5%88%AB%E7%A6%BB%E7%82%B9O%EF%BC%88%E5%9C%A8%E7%82%B9O%E6%97%B6%E9%80%9F%E5%BA%A6%E4%B8%BA0%EF%BC%8931.4mm%2C70.5mm%2C125.4mm%2C%E6%B1%82%E5%87%BA%E4%B8%AD%E9%97%B4%E4%B8%80%E7%82%B9%E7%9A%84%E7%9E%AC%E6%97%B6%E9%80%9F%E5%BA%A6.%E5%85%AC%E5%BC%8F%E5%BA%94%E8%AF%A5%E6%98%AF%5B%28125.4-70.5%29%2B%2870.5-31.4%29%5D%2F%282%2A0.%E5%8C%96%E6%88%90%E5%8D%95%E4%BD%8D%E4%B8%BAm%E6%97%B6%E7%AE%97%E5%BE%97%E4%B8%BA2.35m%2Fs%2C%E5%8F%AF%E6%98%AF%E7%AD%94%E6%A1%88%E5%8D%B4%E6%98%AF1.175.%E5%85%AC%E5%BC%8F%E6%B2%A1%E9%94%99%2C%E8%BF%87%E7%A8%8B%E5%A5%BD%E5%83%8F%E4%B9%9F)
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