Analytic Essay


The results of our experiment showed the buoyancy force on different three different objects that had different weights. The buoyant force was found to be both negative (on the single weight and the two weights and positive on the piece of wood). The results also proved that Archimedes' Principle is, indeed, correct. This was proven by testing for the buoyant force in two different methods. The two buoyant forces found on an object in a fluid were approximately equal in every case. The buoyant forces on each object differed in every case, and are expressed under "Results." Although the results did differ, it was proved that Archimedes' Principle works for any liquid. We used very different liquids with different densities, yet the buoyant force on the object placed into the fluid always equaled the weight of the displaced water. Our results not only show the different buoyant forces, prove Archimedes' Principle, but also can be analyzed to decipher how buoyancy relates to scuba diving.

Buoyancy directly relates to scuba diving. When under water, a diver wants to maintain neutral buoyancy. This is not as easy as it sounds. Through our results we learned that a small weight that weighed 6 grams, which is a hefty amount compared to its small size, would have a negative buoyant force. When the weight's surface area doubled (by using two weights) and the weight doubled, the negative buoyant force also increased. But, on the other hand, when using the piece of wetsuit (approximately the same size as the weight), it easily floated. This is because the surface area was large (the same as the weight) but its mass was much smaller. This proves that by decreasing mass or by increasing surface area a diver can more easily maintain neutral buoyancy.

We are confident with our findings because there seems to be little error in our results or analysis. We were able to insure little to no error by testing and determining the buoyant force in two different ways. Using a spring scale we were easily able to see the object the force upon it. By using Archimedes' Principle, that the weight of the water displaced by the object equals the buoyant force upon that object, we were able to find the buoyant force (which equaled the force found by using the spring scale thus proving that Archimedes' principle IS correct). Since these two numbers approximately equal each other, we were assured that there was not a large margin of error in our experiment findings of the buoyant forces on the three objects. The only reason there could be slight error is because of the objects being very small, and therefore only displacing a small amount of fluid. Nevertheless, I feel confident that the experiment successfully and thoroughly answered our Problem Statement.

We learned many things after doing our experiment. First of all, we learned in order to do experiment good organization is key. Before beginning an experiment all of the components and methods should be well planned out to make the experiment go smoothly and therefore make the results more accurate. Also, testing the components of the experiment before actually completing the experiment is very important. In our case we didn't realize until the last minute that we had to test the wood in a very different method than we planned, because the planned method didn't work to give us the results. This made the experiment more stressful than it needed to be. Although the experiment did go well and results were successfully achieved, there were still some things to be learned from our mistakes or the problems that arose.


 Background Information

Lab Report 

 Analytic Essay

 Display of Results







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