Two weeks ago, we had a new exciting experiment. The activity stated Newton second law of motion. In order to achieve this observation we needed some useful materials such as pulley, robot, Lego Mindstorm and a ruler. By connecting the pulley and the motor by a thin rope, we could lift various masses. The picture below clearly illustrates what I have just mentioned.
We utilized all these “ingredients” to measure diverse materials: speed (RPM), battery discharge, mass(Kg), power(%), time(S), acceleration(RPM/S), g(m/S^2), height(m), mgh(j)and power used(W). The diversity of units made the experiment interesting.
| Speed(RPM) | battery discharge | Mass(kg) | power(%) | time(s) | acceleration(RPM/s) | g (m/s^2) | height(m) | mgh(j) | Power used(W) | |||||||||||
| 0 | 86.052632 | 0 | 111 | 0 | 0.2 | 0 | 75 | 0 | 1.9 | 0 | 45.290859 | 9.8 | 0.33 | 0.6468 | 0.340421053 | |||||
| 0 | 89.346161 | 0 | 97 | 0 | 0.16 | 0 | 75 | 0 | 1.871 | 0 | 47.753159 | 9.8 | 0.33 | 0.51744 | 0.27655799 | |||||
| 0 | 92.006901 | 0 | 56 | 0 | 0.12 | 0 | 75 | 0 | 1.739 | 0 | 52.907936 | 9.8 | 0.33 | 0.38808 | 0.223162737 | |||||
| 0 | 96.17613 | 0 | 56 | 0 | 0.08 | 0 | 75 | 0 | 1.726 | 0 | 55.721976 | 9.8 | 0.33 | 0.25872 | 0.149895713 | |||||
| 0 | 111.265005 | 0 | 84 | 0 | 0.2 | 0 | 95 | 0 | 1.444 | 0 | 77.053327 | 9.8 | 0.33 | 0.6468 | 0.447922438 | |||||
| 0 | 57.112996 | 0 | 55 | 0 | 0.2 | 0 | 55 | 0 | 2.711 | 0 | 21.067133 | 9.8 | 0.33 | 0.6468 | 0.238583549 | |||||
| 0 | 84.980923 | 0 | 83 | 0 | 0.2 | 0 | 75 | 0 | 1.922 | 0 | 44.21484 | 9.8 | 0.33 | 0.6468 | 0.336524454 | |||||
As a first step in the experiment, my classmate and I kept the power constant and change the mass. We observed that the acceleration kept going down as we increased the amount of mass. On the other hand, when we kept the mass constant, and we increased the power level in each trial, we discovered that the acceleration was going up. Then, the professor asked us to illustrate our results in an excel sheet, where all the information were gathered.
The intention of the professor in this part of the experiment was to highlight the Newton second law (Force=Mass*acceleration), which states that the higher the force (power) the greater the object’s acceleration will be and the greater the mass the lower the acceleration will be.
The second part of the experiment was to illuminate the conservation of energy by finding the potential energy, which is represented as the following EP=mgh. We did not need to calculate each time the EP because excel made the task easy for us and counted each trial. As a third task, Muntassir and I examined the relationship between the battery discharge and the mass. As a result, we found out that the higher the mass, the higher the battery discharge.
Finally, we desired to illustrate the link between the power used, which is equal to mgh/t. Again, the excel sheet could count the power used for each trial. The graph demonstrated that the higher the power level the higher the power used would be.
I liked the experiment because of its diversity. We had to analyse the relationship between different components in order to get new results and a new conclusions.
Your blog was well written and you explained everything well.
Great blog! The video also explain how gas and coal companies were banding to say how bad nuclear energy is.