用如图所示的滑轮组以0.5米/秒的速度匀速提起重G1=240牛的重物时,所用的拉力为F1=100牛;现要用同样的速度把重为G2=840牛的物体升高4米时,若不计绳重及摩擦,求:(1)此时滑轮组的机械效率.
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/05 09:03:31
![用如图所示的滑轮组以0.5米/秒的速度匀速提起重G1=240牛的重物时,所用的拉力为F1=100牛;现要用同样的速度把重为G2=840牛的物体升高4米时,若不计绳重及摩擦,求:(1)此时滑轮组的机械效率.](/uploads/image/z/10002845-29-5.jpg?t=%E7%94%A8%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E7%9A%84%E6%BB%91%E8%BD%AE%E7%BB%84%E4%BB%A50.5%E7%B1%B3%2F%E7%A7%92%E7%9A%84%E9%80%9F%E5%BA%A6%E5%8C%80%E9%80%9F%E6%8F%90%E8%B5%B7%E9%87%8DG1%3D240%E7%89%9B%E7%9A%84%E9%87%8D%E7%89%A9%E6%97%B6%2C%E6%89%80%E7%94%A8%E7%9A%84%E6%8B%89%E5%8A%9B%E4%B8%BAF1%3D100%E7%89%9B%EF%BC%9B%E7%8E%B0%E8%A6%81%E7%94%A8%E5%90%8C%E6%A0%B7%E7%9A%84%E9%80%9F%E5%BA%A6%E6%8A%8A%E9%87%8D%E4%B8%BAG2%3D840%E7%89%9B%E7%9A%84%E7%89%A9%E4%BD%93%E5%8D%87%E9%AB%984%E7%B1%B3%E6%97%B6%2C%E8%8B%A5%E4%B8%8D%E8%AE%A1%E7%BB%B3%E9%87%8D%E5%8F%8A%E6%91%A9%E6%93%A6%2C%E6%B1%82%EF%BC%9A%EF%BC%881%EF%BC%89%E6%AD%A4%E6%97%B6%E6%BB%91%E8%BD%AE%E7%BB%84%E7%9A%84%E6%9C%BA%E6%A2%B0%E6%95%88%E7%8E%87.)
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