用一个动滑轮匀速提升重物,若滑轮重10N,手对绳端向上的拉力为30N,则物重为多少N?此滑轮的机械效率为多少?提起的物体重力越大,滑轮的机械效率将怎样变化?
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/17 11:47:13
![用一个动滑轮匀速提升重物,若滑轮重10N,手对绳端向上的拉力为30N,则物重为多少N?此滑轮的机械效率为多少?提起的物体重力越大,滑轮的机械效率将怎样变化?](/uploads/image/z/9332020-28-0.jpg?t=%E7%94%A8%E4%B8%80%E4%B8%AA%E5%8A%A8%E6%BB%91%E8%BD%AE%E5%8C%80%E9%80%9F%E6%8F%90%E5%8D%87%E9%87%8D%E7%89%A9%2C%E8%8B%A5%E6%BB%91%E8%BD%AE%E9%87%8D10N%2C%E6%89%8B%E5%AF%B9%E7%BB%B3%E7%AB%AF%E5%90%91%E4%B8%8A%E7%9A%84%E6%8B%89%E5%8A%9B%E4%B8%BA30N%2C%E5%88%99%E7%89%A9%E9%87%8D%E4%B8%BA%E5%A4%9A%E5%B0%91N%3F%E6%AD%A4%E6%BB%91%E8%BD%AE%E7%9A%84%E6%9C%BA%E6%A2%B0%E6%95%88%E7%8E%87%E4%B8%BA%E5%A4%9A%E5%B0%91%3F%E6%8F%90%E8%B5%B7%E7%9A%84%E7%89%A9%E4%BD%93%E9%87%8D%E5%8A%9B%E8%B6%8A%E5%A4%A7%2C%E6%BB%91%E8%BD%AE%E7%9A%84%E6%9C%BA%E6%A2%B0%E6%95%88%E7%8E%87%E5%B0%86%E6%80%8E%E6%A0%B7%E5%8F%98%E5%8C%96%3F)
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