斜面长长4m,质量为50kg的小明站在斜面顶端,用平行于斜面向上的75N的拉力蒋100N重的物体从斜面低端匀速拉到斜面顶端,那么:A:小明对物体做的总功为多少?B:斜面的机械效率是多少?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/29 13:55:10
![斜面长长4m,质量为50kg的小明站在斜面顶端,用平行于斜面向上的75N的拉力蒋100N重的物体从斜面低端匀速拉到斜面顶端,那么:A:小明对物体做的总功为多少?B:斜面的机械效率是多少?](/uploads/image/z/531335-47-5.jpg?t=%E6%96%9C%E9%9D%A2%E9%95%BF%E9%95%BF4m%2C%E8%B4%A8%E9%87%8F%E4%B8%BA50kg%E7%9A%84%E5%B0%8F%E6%98%8E%E7%AB%99%E5%9C%A8%E6%96%9C%E9%9D%A2%E9%A1%B6%E7%AB%AF%2C%E7%94%A8%E5%B9%B3%E8%A1%8C%E4%BA%8E%E6%96%9C%E9%9D%A2%E5%90%91%E4%B8%8A%E7%9A%8475N%E7%9A%84%E6%8B%89%E5%8A%9B%E8%92%8B100N%E9%87%8D%E7%9A%84%E7%89%A9%E4%BD%93%E4%BB%8E%E6%96%9C%E9%9D%A2%E4%BD%8E%E7%AB%AF%E5%8C%80%E9%80%9F%E6%8B%89%E5%88%B0%E6%96%9C%E9%9D%A2%E9%A1%B6%E7%AB%AF%2C%E9%82%A3%E4%B9%88%EF%BC%9AA%EF%BC%9A%E5%B0%8F%E6%98%8E%E5%AF%B9%E7%89%A9%E4%BD%93%E5%81%9A%E7%9A%84%E6%80%BB%E5%8A%9F%E4%B8%BA%E5%A4%9A%E5%B0%91%3FB%3A%E6%96%9C%E9%9D%A2%E7%9A%84%E6%9C%BA%E6%A2%B0%E6%95%88%E7%8E%87%E6%98%AF%E5%A4%9A%E5%B0%91%3F)
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