| 1 | This scale indicates, in my case, 165 pounds. | |
| 2 | Harmonic Motion: experimental board, spring weight, loaded board, counterpoise, stopwatch. | |
| 3 | Understand why and how to measure your rubbish and energy. | |
| 4 | You accelerate the system, the tension will increase and you will see that, you will read that on the scale. | |
| 5 | The improved Jolly spring balance has the advantages of beautiful shape, easy for adjusting, good stability and high precision. |