In this second lab, we explored Newton’s second Law: F=ma. To demonstrate this we were supposed to use the Lego Mindstorm motor to lift weights with a pulley. We would change up the amount of weight and the force used to pull it up, and record our findings. Unfortunately, we ran into some difficulties. When the entire class tried their pulleys, none of the computers in the class seemed to record the data.
However, even though we could not complete the experiment ourselves, we were given sample data. This finished data was helpful in understanding what the process was all about.
| speed (rpm) | mass | power | time | acceleration rpm/s | |||||
| 113.8889 | 0.25 | 100 | 1.98 | 57.52 | |||||
| 74.36 | 0.25 | 80 | 2.23 | 33.356 | |||||
| 45.89 | 0.25 | 60 | 3.857 | 11.898 | |||||
| 14.79 | 0.25 | 40 | 12.558 | 1.17 | |||||
| 21.51 | 0.21 | 40 | 8.454 | 2.544 | |||||
| 43.85 | 0.17 | 40 | 4.093 | 10.71 | |||||
| 47.2 | 0.13 | 40 | 3.746 | 12.601 | |||||
| 56.2 | 0.09 | 40 | 3.658 | 13.725 | |||||
From the data, we worked in partners to construct a graphs.
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The three majors things focused on in this experiment were the law of conservation, power, and velocity. We also looked at potential energy which is equal to mgh. I really wish we got to work handson and do this experiment ourselves. I feel if we had gotten the oppurtunity to do it, it would’ve been easier to obtain the new material. However, I did learn from the data and hopefully have the right understanding!