实验次数 | 斜面倾斜角 | 小车重G/N | 斜面高h/m | 斜面长s/m | 拉力F/N | 有用功 | 总功 | 机械效率 |
① | 12° | 5 | 0.2 | 1 | 2.1 | 1.0 | 2.1 | ______ |
② | 30° | 5 | 0.5 | 1 | 3.6 | 2.5 | ______ | 69.4% |
③ | 45° | 5 | 0.7 | 1 | 4.3 | 3.5 | 4.3 |