实验次数 | 动力F1/N | 动力臂L1/m | 阻力F2/N | 阻力臂L2/m |
1 | 2.0 | 0.04 | 4.0 | 0.02 |
2 | 1.0 | 0.02 | 0.5 | 0.01 |
3 | 2.5 | 0.03 | 1.5 | 0.05 |
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 | 81.4% |
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