Lab 2: Fluid Statics

Lab Purpose:
     Measure buoyant forces experimentally through three different methods and compare measurements.

Part 1: Underwater Weighing Method
     Use Archimede's principle to determine the weight of an object through displacement of water.

     Mass in air = 1.101 N
     Mass in water = .73 N
     In the free body diagram, there are three forces acting upon the metal cylinder: tension, gravity, and
     buoyant force.

Part 2: Displaced Fluid Method
     Find the weight of water that is displaced.

     B = mg - T = .371 N
     Mass of beaker = .1282 kg
     Mass of beaker + water = .1672 kg
     Mass of water = .039 kg
     Mass of displaced water = .3822 N

Part 3: Volume of Object Method
     Use volume of a cylinder to find the volume of displaced water and then obtain the weight of that
     displaced water.

     Volume of Cylinder = h*πr^2
     Height = .076 m
     Diameter = .0255 m
     Volume = 3.88e-5 m^3
     Weight of water = ρgV = .38 N

Part 4: Summary
     1. The three values are respectively: .371 N, .3822 N, .38 N
     2. Force probe is likely most accurate due to it not relying on human accuracy.
     3. Buoyant force would be lower because the bottom of the cylinder would apply a normal force.