As our robot experiment of the day as a class we had to determine mass and velocity and energy using our robots, weights, and a pulley. What we had to learn before going into this experiment is a couple formulas and guidelines: The higher the power level the more force is going to be used. The more the mass the more or higher the acceleration will be. Mass is the same everywhere even on the moon, and weight depends on the gravitation pull, which is why as humans we weigh differently on the moon or on pluto than how we much we weigh on the earth. In order for anything to work it has to have power behind it which essentially is work divided by time, or how much work someone or something puts into moving or doing something divided by how much time it took to accomplish. So, essentially the more power the less time it will take, and vice versa the less time it takes the more power an object will have. In this experiment we also needed to be sure we knew what acceleration is, and how it is velocity/time.
The experiment started out with doing eight runs with the mass, pulley, and robot. The first four contained a constant power level of 75, and determining the mass for 1-4. As a group we got m1 as .17, m2 as .23 m3 as .21 and m4 as .19. The second run was to find the power by using a constant mass of .25. The power was interesting because while keeping a constant mass the power went up by ten each time, therefore p1 was 50, p2 was 60, p3 was 70, and p4 was 80. The mean height was 23 inches. The second step was to find potential energy which is the Mass*Gravitational field* Height. Therefore, it is .25*9.8*.23, which will give you the potential energy of the experiment.
When we ended up doing our graphs they were off and not like the graph that was shown in class at all.
| 4.169158 | 0 | 27 | 0 | 0.25 | 0 | 50 | 0 | 53.528 | 0 | 0.077887 | 0.235 | 9.8 | 0.57575 | ||
| 59.394146 | 0 | 14 | 0 | 0.25 | 0 | 60 | 0 | 2.938 | 0 | 20.215843 | 0.235 | 9.8 | 0.57575 | ||
| 84.050488 | 0 | 83 | 0 | 0.25 | 0 | 70 | 0 | 3.486 | 0 | 24.110869 | 0.235 | 9.8 | 0.57575 | ||
| 101.013368 | 0 | 42 | 0 | 0.25 | 0 | 80 | 0 | 1.546 | 0 | 65.33853 | 0.235 | 9.8 | 0.57575 | ||
| 73.790759 | 0 | 14 | 0 | 0.245 | 0 | 75 | 0 | 2.157 | 0 | 34.209902 | |||||
| 80.696467 | 0 | 69 | 0 | 0.205 | 0 | 75 | 0 | 1.991 | 0 | 40.530622 | |||||
| 81.90081 | 0 | 83 | 0 | 0.165 | 0 | 75 | 0 | 1.687 | 0 | 48.548198 |
This is an example of the data that we took. In conclusion our results were not consistent with the law of physics because our graphs ended up way off.
If our graphs followed the laws of physics the graphs would be described as-
Graph 1 is on acceleration vs mass with a fixed power level. When the power level is fixed and the mass rises it will be harder to have an acceleration because behind any energy force power is needed. When thinking about acceleration vs mass one should think about when a train is going down the tracks it is much harder for this train to stop than a car going down the street because the train is heavier and uses more power to go which ultimately means it takes more power to stop than the car.
Graph 2: Acceleration Vs power Level with a fixed mass level. When an object has a fixed mass level the power will stay the same. If the max is the same the power will stay the same in the sense that there won’t be a change in power unless we manually changed the power. If the power raises the acceleration will raise and vice versa.
Graph 3: Batter discharge VS mass with a fixed power level: If the battery is being used up because the mass is higher than the battery will be working harder and will be drained quicker. If the mass is lower and the power level is fixed than the batter will not be using as much power.
Graph 4: Power used(mgh/t) vs power level: To find this information the previous information that is supplied about determining power is to use work/time, and that the larger the power the more work and time used. The greater the power the more quickly it can do the work(or the time).