次数 | 物体的重力G/N | 提升高度h/cm | 拉力F/N | 绳端移动的距离s/cm | 机械效率η |
1 | 2 | 10 | 1 | 30 | |
2 | 3 | 10 | 1.4 | 30 | 71.4% |
3 | 4 | 10 | 1.8 | 30 | 74.1% |
4 | 2 | 10 | 1.5 | 20 | 66.7% |