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.