斜面倾斜角θ | 小车重G/N | 斜面高h/m | 斜面长s/m | 拉力F/N | 有用功W有/J | 总功W总/J | 机械效率η |
12° | 5 | 0.2 | 1 | 2.1 | _____ | 2.1 | 48% |
30° | 5 | 0.5 | 1 | 3.6 | 2.5 | __ | 69% |
45° | 5 | 0.7 | 1 | 4.3 | 3.5 | 4.3 | __ |