同济大学刚体转动惯量实验
12
7.589
8.256
11
7.163
7.822
10
6.739
7.389
9
6.303
6.945
8
5.844
6.475
7
5.359
5978
6
4.84
5.444
5
4.283
4.867
4
3.674
4.232
3
2.997
3.52
2
2.222
2.689
1
1.285
1.646
β2,t1
2.998 3.221
β2,t2
8.01 7.567 7.126
β2,t1 β2,t2 β1,t1 β1,t2 β2 β1 J 理论值 实际值 误差
9
6.687
6.541
7.039
6.523
6.672
8
6.209
6.066
6.555
6.048
6.193
7
5.702
5.564
6.042
5.545
5.687
6
5.161
5.027
5.493
17
11.75 11.794 11.846 11.842 11.823
16
11.23
11.27 11.324 11.317
11.3
15 10.712
10.75 10.804 10.796 10.781
14 10.196 10.231 10.286 10.276 10.262
13
9.683
9.714
9.771
4.797 4.728 4.948
4.72 4.801
1.349 1.341 1.362
1.34 1.346
3.176 3.156 3.207 3.154 3.168
0.75599 0.758553 0.757112 0.755431 0.753453
-0.06819 -0.06622 -0.0678 -0.06717 -0.06628
9.759
9.746
12
9.171
9.199
9.257
9.243
9.232
11
8.662
8.687
8.746
8.73
8.72
10
8.154
8.177
8.235
8.218
8.21
9
7.633
7.652
7.712
7.694
7.687
8
7.083
7.099
7.16
7.14
7.135
7
6.502
6.514
6.575
7 -0.0668
3 0.02223
2
2.
转动次数(π) 圆环 175,215,936,砝码 100 20 13.323 13.377 13.426
13.427
13.403
19 12.797 12.847 12.897 12.897 12.874
18 12.272 12.319
12.37 12.268 12.347
同济大学 刚体转动惯量实验报告
实验成员:*** 实验组别:第四组 实验时间:2013.10.28 实验地点:力学实验中心 105
一. 实验目的 1. 了解多功能计数计时毫秒仪实时测
量(时间)的基本方法 2. 用刚体转动法测定物体的转动惯量 3. 验证刚体转动的平行轴定理
4. 验证刚体的转动惯量与外力矩无关
6.554
6.552
6
5.98
5.89
5.95
5.927
5.927
5
5.211
5.217
5.276
5.252
5.255
4
4.479
4.482
4.538
4.512
4.519
3
3.664
3.661
3.715
3.691
3.698
2
2.726
2.719
2.766
2.749
2.753
1
1.586
1.58
1.61
6.004
5
5.311
5.386
5.308
4
4.552
4.624
4.549
3
3.709
3.718
3.707
2
2.744
2.808
2.743
1
1.58
1.632
1.58
β2,t1
3.731 3.754 3.728
β2,t2
5.677 5.707 5.678
β1,t1
1.611 1.616 1.616
β1,t2
8.761
9.294
8.316
8.843
7.873
8.392
7.432
7.944
6.992
7.497
11.452 10.996 10.541 10.089
9.638 9.19
8.742 8.298 7.854 7.413 6.974
11.624 11.166 10.709 10.255
9.802 9.352 8.902 8.456
14 10.419 10.591 10.507
13
9.965 10.055
9.971
12
9.431
9.52
9.437
11
8.901
8.988
8.905
10
8.372
8.458
8.375
9
7.83
7.913
7.831
8
7.257
7.339
7.258
7
6.652
6.731
6.651
6
6.006
6.083
θ=ω0t+0.5βt2 若在 t1、t2 时刻测得角位移θ1 和θ2, 则
θ1=ω0t1+0.5βt12 θ2=ω0t2+0.5βt22
所以,有以上两方程可得
β=2(θ2t1-θ1t2)/t1t2(t2-t1)
三. 实验步骤 1. 放置仪器,滑轮置于实验台外 3-4cm,
调节仪器水平,设置毫秒仪计数次数 2. 连接传感器与计数计时毫秒仪,调节
6.76 6.325 5.866
5.38 4.862 4.304 3.695 3.018
2.24 1.299 3.005 4.567 1.29 3.034 0.81061
1 -0.0662
4 0.02231
6
11.153 10.713 10.274
9.837 9.402 8.969 8.536 8.106 7.677 7.251 6.825 6.388 5.928 5.441
5.97 5.391 4.768 4.088 3.332 2.465 1.421 3.347
β2,t2 β1,t1 β1,t2 β2 β1 J 理论值 实际值 误差
5.145 1.453 3.419 0.641425 -0.0553 0.028095 0.027393 0.027792 1.40%
1.603
1.605
β2,t1
3.625 3.637 3.666 3.649
3.65
β2,t2
5.497 5.519
ห้องสมุดไป่ตู้
5.55 5.537
5.53
β1,t1
1.547 1.556 1.553 1.558 1.554
β1,t2
3.64 3.663 3.655 3.668 3.657
β2
0.570211 0.562391 0.567179 0.558919 0.567646
11
8.099
10
7.622
9
7.133
8
6.617
7
6.071
6
5.487
5
4.859
4
4.172
3
3.409
2
2.533
1
1.472
β2,t1
3.387
80mm 12.342
11.85 11.36 10.873 10.387 9.904 9.422 8.943 8.465 7.989 7.515 7.029 6.517 5.975 5.396 4.774 4.094 3.338 2.472 1.426 3.348
5.
转动次数(π) 验证平行轴
120mm
20 13.755 13.859
13.78
19 13.207 13.309 13.229
18 12.661 12.761 12.679
17 12.117 12.215 12.132
16 11.576 11.671 11.587
15 11.037 11.131 11.046
2 -0.0684
7 0.02222
1
11.113 10.674 10.236
9.8 9.366 8.934 8.503 8.074 7.646
7.22 6.795
6.36 5.9
5.414 4.895 4.336 3.725 3.045 2.264 1.316 3.02 4.584 1.292 3.039 0.81329
3.79 3.804 3.809
5.091 1.444 3.399 0.649374 -0.05825 0.027662
5.08 1.443 3.397 0.647577 -0.05901 0.027702
5.086 1.449 3.412 0.646145 -0.06018 0.027713