Download Archimedes Principle and more Summaries Physics in PDF only on Docsity! Archimedes Principle Experiment Objectives: Investigating and testing Archimedes’ principle by directly measuring the buoyant force acting on a submerged object. This will be done for a number of different materials. Equipment: 1. Spring balance 2. Wood cube 3. Standard masses 4. Glass bottle 5. Denatured alcohol Theory Archimedes' principle states that a body wholly or partially submerged in a fluid is buoyed up by a force equal in magnitude to the weight of the fluid displaced by the body. It is important to remember that fluids include both liquids and gases. The buoyant force is given by: Fp= pgV Where: p (tho) is the density of the fluid V is the volume of fluid displaced g is acceleration due to gravity. Exp.: it is the buoyant force that keeps ships afloat and hot air balloons aloft. In this experiment, the buoyant force will be measured three ways The three ways are as follows: « Direct Measurement of Mass. « Displacement Method. « Direct Measurement of Mass. The Direct Measurement of Mass Requires measuring the mass of an object first in air see figure (1), then in water Though the mass of the object does not change, it apparent weight will change when measured while immersed in a fluid that is denser than air. Fg= Fa_Fw T1 Figure (1): measuring the mass in the air and water The Displacement Method Requires measurement of the volume of fluid displaced by the object. The weight of the fluid displaced is equal to the buoyant force exerted on the object. Fg= PftuieagAV The direct measurement of volume method (for an object that sinks) requires measuring the dimensions of an object and calculating the volume. This volume is equal to the volume of fluid that would be displaced if the object were immersed. Fp = PfwuieagAV Questions: 1. Write the equipment which used in this experiment in the above exact location. 2. Which of these methods have been studied in the laboratory and which has been applied? 3. Write your records in the following table? The original liquid (water) volume. . Mi- Dui- Fbi- M2- Dv2- Fb2= M3= Dv3- Fb3= Where: Mis mass Dv is the displacement volume Fb is the up thrust force 4. Plot a graph that contains a relationship between the mass and the displacement volume.
