机械能守恒质量为m的小球沿半径为R的1/4圆弧光滑轨道MN滑下,H为MN的中点,由M滑到H所用的时间为t,则在H点重力的功率是多少ps:答案是1/2的四分之一次方乘一堆东西,而我算的是2的四分之一次方
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![机械能守恒质量为m的小球沿半径为R的1/4圆弧光滑轨道MN滑下,H为MN的中点,由M滑到H所用的时间为t,则在H点重力的功率是多少ps:答案是1/2的四分之一次方乘一堆东西,而我算的是2的四分之一次方](/uploads/image/z/4651257-57-7.jpg?t=%E6%9C%BA%E6%A2%B0%E8%83%BD%E5%AE%88%E6%81%92%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E5%B0%8F%E7%90%83%E6%B2%BF%E5%8D%8A%E5%BE%84%E4%B8%BAR%E7%9A%841%2F4%E5%9C%86%E5%BC%A7%E5%85%89%E6%BB%91%E8%BD%A8%E9%81%93MN%E6%BB%91%E4%B8%8B%2CH%E4%B8%BAMN%E7%9A%84%E4%B8%AD%E7%82%B9%2C%E7%94%B1M%E6%BB%91%E5%88%B0H%E6%89%80%E7%94%A8%E7%9A%84%E6%97%B6%E9%97%B4%E4%B8%BAt%2C%E5%88%99%E5%9C%A8H%E7%82%B9%E9%87%8D%E5%8A%9B%E7%9A%84%E5%8A%9F%E7%8E%87%E6%98%AF%E5%A4%9A%E5%B0%91ps%3A%E7%AD%94%E6%A1%88%E6%98%AF1%2F2%E7%9A%84%E5%9B%9B%E5%88%86%E4%B9%8B%E4%B8%80%E6%AC%A1%E6%96%B9%E4%B9%98%E4%B8%80%E5%A0%86%E4%B8%9C%E8%A5%BF%2C%E8%80%8C%E6%88%91%E7%AE%97%E7%9A%84%E6%98%AF2%E7%9A%84%E5%9B%9B%E5%88%86%E4%B9%8B%E4%B8%80%E6%AC%A1%E6%96%B9)
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