质量为m的物体静止在地面上,物体上面连着一个轻弹簧用手拉着弹簧上端缓慢提高h,不计弹簧质量,则人做的功,答案是大于mgh,我觉得是小于,因为弹力也拉物体了,还有分析一下受力吧
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/10 22:36:01
![质量为m的物体静止在地面上,物体上面连着一个轻弹簧用手拉着弹簧上端缓慢提高h,不计弹簧质量,则人做的功,答案是大于mgh,我觉得是小于,因为弹力也拉物体了,还有分析一下受力吧](/uploads/image/z/8083006-70-6.jpg?t=%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E7%89%A9%E4%BD%93%E9%9D%99%E6%AD%A2%E5%9C%A8%E5%9C%B0%E9%9D%A2%E4%B8%8A%2C%E7%89%A9%E4%BD%93%E4%B8%8A%E9%9D%A2%E8%BF%9E%E7%9D%80%E4%B8%80%E4%B8%AA%E8%BD%BB%E5%BC%B9%E7%B0%A7%E7%94%A8%E6%89%8B%E6%8B%89%E7%9D%80%E5%BC%B9%E7%B0%A7%E4%B8%8A%E7%AB%AF%E7%BC%93%E6%85%A2%E6%8F%90%E9%AB%98h%2C%E4%B8%8D%E8%AE%A1%E5%BC%B9%E7%B0%A7%E8%B4%A8%E9%87%8F%2C%E5%88%99%E4%BA%BA%E5%81%9A%E7%9A%84%E5%8A%9F%2C%E7%AD%94%E6%A1%88%E6%98%AF%E5%A4%A7%E4%BA%8Emgh%2C%E6%88%91%E8%A7%89%E5%BE%97%E6%98%AF%E5%B0%8F%E4%BA%8E%2C%E5%9B%A0%E4%B8%BA%E5%BC%B9%E5%8A%9B%E4%B9%9F%E6%8B%89%E7%89%A9%E4%BD%93%E4%BA%86%2C%E8%BF%98%E6%9C%89%E5%88%86%E6%9E%90%E4%B8%80%E4%B8%8B%E5%8F%97%E5%8A%9B%E5%90%A7)
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