The purpose of this lab was to try a variety of measurement methods in order to determine an experimental buoyant force value.
.Materials
Force Probe, String, Overflow Can, Beaker to Catch Overflow, Metal Cylinders, Meter Stick, Ring Stand, Calipers
Under Water Weighting Method
We tied the metal cylinder to a piece of sting (after weighing the metal cylinder) and tied the other end to a force probe so that we could get a measurement of the tension of the object when we submerged it through the force probe. We then obtained a ring stand and hung our force probe from it so that we could get a less varying result. We submerged the hanging mass in our canister of water and used the formula Buoyancy Force = Weight - Tension to find a Buoyancy force of approx. 1.67 N.
Displaced Fluid Method
We prepared a overflow can and an additional container to catch spill over water. We then placed the full overflow can on the edge of the table and held the beaker underneath. After slowly lowering the metal cylinder into the can of water and catching all of the spill over water we measured the weight of the spill over water which using Archimede's principle is equal to the buoyancy force 1.035 N
Volume of Object Method
The last method we used is we determined the volume of the object which would also be the amount of water displaced when we inserted it to the overflow can. Thus we could find the weight of the displaced water by taking the volume of the object and multiplying the density of water. And using the Archimede's principle we can be sure that the two values are the same after conversion 1.01 N
