lab_17 - LAB# 17 ARCHIMEDES PRINCIPLE Introduction: The...

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LAB # 17 ARCHIMEDES’ PRINCIPLE Introduction: The objective of this experiment is to investigate and test Archimedes’ principle by directly measuring the buoyant force acting on a submerged object. This will be done for a number of different materials. We will also determine the specific gravity for these materials. Figure 1: Equipment for the Archimedes experiment showing the spring balance, brass cylinder, aluminum cylinder, wooden cylinder and stand. Equipment: Spring balance, Wood cylinder, Standard masses, Glass bottle, denatured alcohol, Brass cylinder, Aluminum cylinder, Vernier caliper. Theory: Whenever a solid body is immersed in a fluid, it displaces a volume of fluid equal to its own volume. Since the displaced fluid was in equilibrium with the surrounding fluid before being displaced, meaning the buoyant force on the displaced fluid was equal to its weight, an equal buoyant force will be exerted on the solid body. In other words, for any solid body the buoyant force acting on it is equal to the weight of the fluid displaced. This is true whether the fluid is a liquid or a gas.
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Figure 2: Measuring the weight of the brass cylinder in air. The weight of the cylinder is in equilibrium with the tension in the cord. Figure 3: Measuring the weight of the brass cylinder in water. The tension in the cord is in equilibrium with the difference between the weight of the cylinder and the buoyant force on the cylinder. The density of any object, usually abbreviated as
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This note was uploaded on 02/29/2012 for the course PHYS 227 taught by Professor Rabe during the Fall '08 term at Rutgers.

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lab_17 - LAB# 17 ARCHIMEDES PRINCIPLE Introduction: The...

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