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 |
__ |