Cycle II AP Physics

John Dewey High School

Mr. Klimetz

Archimedes' Principle, Density

and the Dynamics of Fluids

Concept Experiment

Laboratory No. 2

General Instructions. Archimedes' Principle equates the buoyant force experienced by a solid object immersed in a fluid to the weight of the fluid displaced. The flotation of an insoluble object placed within a fluid body depends primarily upon the density contrast between the object and the fluid. Although surface tension, surface area, pressure and density changes with depth, and viscosity contribute a measurable influence on flotation, they are neglected in this situation. Based on your understanding of Archimedes' Principle, you are to design and construct a concept experiment to reaffirm its validity. That is, based on your knowledge of the scientific method and the processes by which scientific investigation is conducted, you are to design a comprehensive experiment whereby Archimedes' Principle can be demonstrated and reaffirmed. The solid objects employed must possess densities both greater than and less than that of the fluid in which they are immersed. Your concept experiment must possess the following elements: an introduction, hypothesis, statement of objective(s), assumptions, list of required equipment, procedure, data table(s), and equations. You should also be prepared to discuss any potential sources of error that may arise from your design and any steps that might be implemented to obviate them. Prepare your experiment thoughtfully, creatively and tersely. Your experiment will be graded on the basis of the efficacy of your apparatus design as well as the clarity with which you communicate your ideas in writing. Due Tuesday, December 10.